2021
Number 2021 is an odd four-digits composite number and natural number following 2020 and preceding 2022.
| Nominal | 2021 |
| Cardinal | two thousand twenty-one |
Cardinal two thousand twenty-one |
| Ordinal | 2,021st |
| Number of digits | 4 |
| Sum of digits | 5 |
| Product of digits | 0 |
| Number parity | Odd |
Calculation was done in 0.0000391006 seconds
| Prime factorization | 43 x 47 |
| Prime factors | 43, 47 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 90 |
| Product of prime factors | 2021 |
Calculation was done in 0.0000109673 seconds
| List of proper divisors | 1, 43, 47 |
| List of all dividers | 1, 43, 47, 2021 |
| Number of divisors d(n) | 4 |
| Sum of all divisors σ(n) | 2112 |
| Aliquot sum | 91 |
| 2021 is a deficient number , since it is larger than the sum of its proper divisors (91). Its deficiency is 1930. |
Calculation was done in 0.0000171661 seconds
| Is 2021 a prime number? | No |
| Is 2021 a semiprime number? | Yes |
| Is 2021 a Chen prime number? | No |
| Is 2021 a Mersenne prime number? | No |
Calculation was done in 0.0009489059 seconds
| Is 2021 a Catalan number? | No |
| Is 2021 a Fibonacci number? | No |
| Is 2021 a Idoneal number? | No |
Calculation was done in 0.0000040531 seconds
| 2021 is not a Happy number |
| 2021 is not a Humble number |
| 2021 is not a Münchhausen number |
| 2021 is not a Perfect number |
| 2021 is not a Perfect square |
| 2021 is not a Palindrome |
Calculation was done in 0.0061399937 seconds
| Base | System | Value |
|---|
| 2 | Binary | 111111001012 |
| 3 | Ternary | 22022123 |
| 4 | Quaternary | 1332114 |
| 5 | Quinary | 310415 |
| 6 | Senary | 132056 |
| 7 | Septenary | 56157 |
| 8 | Octal | 37458 |
| 9 | Nonary | 26859 |
| 10 | Decimal | 2021 |
| 12 | Duodecimal | 120512 |
| 16 | Hexadecimal | 7e516 |
| 20 | Vigesimal | 51120 |
| 36 | Base36 | 1k536 |
| 60 | Sexagesimal | Xf60 |
Calculation was done in 0.0000197887 seconds
| Square of 2021 (n2) | 4084441 |
| Cube of 2021 (n3) | 8254655261 |
| Square root of 2021 | 44.955533585978 |
| Natural Logarithm (ln) of 2021 | 7.6113477174036 |
| Decimal Logarithm (log) of 2021 | 3.3055663135153 |
Calculation was done in 0.0000040531 seconds
| Sine of 2021 | -0.81684695342232 |
| Cosecant of 2021 | -1.2242195380791 |
| Cosine of 2021 | -0.5768544484397 |
| Secant of 2021 | -1.7335395483295 |
| Tangent of 2021 | 1.41603649869 |
| Cotangent of 2021 | 0.70619648640772 |
Calculation was done in 0.0000100136 seconds
Is 2021 an Even Number?
No
Is 2021 an Odd Number?
Yes, the number 2021 is an odd number.
Total number of all odd numbers from 1 to 2021 is
1011Sum of all the odd numbers from 1 to 2021 are 1022121
The sum of all odd numbers is a perfect square: 1022121 = 1011
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.Previous odd number is
2019
Calculation was done in 0.0000071526 seconds
| The spelling of 2021 in words is "two thousand twenty-one", meaning that: |
| 2021 is not an aban number (as it contains the letter a) |
| 2021 is not an eban number (as it contains the letter e) |
| 2021 is an iban number (a number without the letter i) |
| 2021 is not an oban number (as it contains the letter o) |
| 2021 is not a tban number (as it contains the letter t) |
| 2021 is not an uban number (as it contains the letter u) |
Calculation was done in 0.0000028610 seconds
| Bengali numerals | ২০২১ |
| Eastern Arabic numerals | ٢٬٠٢١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓆼𓆼𓎇𓏺 |
| Khmer numerals | ២០២១ |
| Japanese numerals | 二千二十一 |
| Roman numerals | MMXXI |
| Thai numerals | ๒๐๒๑ |
Calculation was done in 0.0000779629 seconds
| Arabic | ألفين و واحد و عشرون |
| Croatian | dvije tisuće dvadeset i jedan |
| Czech | dvě tisíce dvacet jeden |
| Danish | to tusinde en og tyve |
| Dutch | tweeduizend éénentwintig |
| Estonian | akpe eve kple blaeve vɔ ɖekɛ |
| Faroese | tvey tusin og tjúgoein |
| Filipino | dalawáng libó’t dalawáng pû’t isá |
| Finnish | kaksituhattakaksikymmentäyksi |
| French | deux mille vingt et un |
| Greek | δύο χίλιάδες είκοσι ένα |
| German | zweitausendeinundzwanzig |
| Hebrew | אלפיים עשרים ואחת |
| Hindi | दो हज़ार इक्कीस |
| Hungarian | kétezerhuszonegy |
| Icelandic | tvö þúsund og tuttugu og einn |
| Indonesian | dua ribu dua puluh satu |
| Italian | duemilaventuno |
| Japanese | 二千二十一 |
| Korean | 이천이십일 |
| Latvian | divtūkstoš divdesmit viens |
| Lithuanian | du tūkstančiai dvidešimt vienas |
| Norwegian | to tusen og tjueén |
| Persian | دو هزار و بیست و یک |
| Polish | dwa tysiące dwadzieścia jeden |
| Portuguese | dois mil e vinte e um |
| Romanian | două mii douăzeci şi unu |
| Russian | две тысячи двадцать один |
| Serbian | две хиљада двадесет и један |
| Slovak | dve tisíc dvadsaťjeden |
| Slovene | dvije tisuće dvaset ena |
| Spanish | dos mil veintiuno |
| Swahili | elfu mbili, ishirini na moja |
| Swedish | tvåtusentjugoen |
| Thai | สองพันยี่สิบเอ็ด |
| Turkish | iki bin yirmi bir |
| Ukrainian | дві тисячі двадцять один |
| Vietnamese | hai nghìn không trăm hai mươi mốt |
Calculation was done in 0.0140180588 seconds
| Number 2021 reversed | 1202 |
| Unicode Character | U+07E5 | ߥ |
| Unix Timestamp | Thu, 01 Jan 1970 00:33:41 +0000 |
Calculation was done in 0.0000247955 seconds
This page was generated in 0.02 seconds.