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11

Number 11 (eleven) is an odd two-digits prime number and natural number following 10 and preceding 12.

Properties of the number 11

Nominal11
Cardinaleleven
Ordinal11th
Number of digits2
Sum of digits2
Product of digits1
Number parityOdd
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Prime Factorization of 11

Prime factorization11
Prime factors11
Number of distinct prime factors ω(n)1
Total number of prime factors Ω(n)1
Sum of prime factors11
Product of prime factors11
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Divisors of 11

List of proper divisors 1
List of all dividers1, 11
Number of divisors d(n)2
Sum of all divisors σ(n)12
Aliquot sum 1
11 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 10.
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Prime numbers

Is 11 a prime number?Yes
Is 11 a semiprime number?No
Is 11 a Chen prime number?Yes
Is 11 a Mersenne prime number?No
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Sequences

Is 11 a Catalan number?No
Is 11 a Fibonacci number?No
Is 11 a Idoneal number?No
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Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.
11 is not a Happy number
11 is not a Humble number
11 is not a Münchhausen number
11 is not a Perfect number
11 is not a Perfect square
11 is a Palindrome
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Numeric Bases of 11

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.
BaseSystemValue
2Binary10112
3Ternary1023
4Quaternary234
5Quinary215
6Senary156
7Septenary147
8Octal138
9Nonary129
10Decimal11
12Duodecimalb12
16Hexadecimalb16
20Vigesimalb20
36Base36b36
60SexagesimalB60
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Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.
Square of 11 (n2)121
Cube of 11 (n3)1331
Square root of 113.3166247903554
Natural Logarithm (ln) of 112.3978952727984
Decimal Logarithm (log) of 111.0413926851582
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Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 11-0.9999902065507
Cosecant of 11-1.0000097935452
Cosine of 110.0044256979880508
Secant of 11225.95305931402
Tangent of 11-225.9508464542
Cotangent of 11-0.0044257413313241
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Number parity

Parity is the property of an integer of whether it is even or odd.

Is 11 an Even Number?

No

Is 11 an Odd Number?

Yes, the number 11 is an odd number.
Total number of all odd numbers from 1 to 11 is 6
Sum of all the odd numbers from 1 to 11 are 36
The sum of all odd numbers is a perfect square: 36 = 6
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.
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Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".
The spelling of 11 in words is "eleven", meaning that:
11 is an aban number (a number without the letter a)
11 is not an eban number (as it contains the letter e)
11 is an iban number (a number without the letter i)
11 is an oban number (a number without the letter o)
11 is a tban number (a number without the letter t)
11 is an uban number (a number without the letter u)
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Numeral systems

How to write 11 in other number systems?
Bengali numerals১১
Eastern Arabic numerals١١
Hieroglyphs numeralsused in Ancient Egypt𓎆𓏺
Khmer numerals១១
Japanese numerals十一
Roman numeralsXI
Thai numerals๑๑
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Translation

How do you say 11 in 38 different languages?
Arabicإحدى عشر
Croatianjedanaest
Czechjedenáct
Danish elleve
Dutchelf
Estonianwuiɖekɛ
Faroeseellivu
Filipinolabíng-isá
Finnishyksitoista
Frenchonze
Greekέντεκα
Germanelf
Hebrewאחת עשרה
Hindiग्यारह
Hungariantizen­egy
Icelandicellefu
Indonesiansebelas
Italianundici
Japanese十一
Korean십일
Latvianvienpadsmit
Lithuanianvienuolika
Norwegianelleve
Persianیازده
Polishjedenaście
Portugueseonze
Romanianunsprezece
Russianодиннадцать
Serbianједанаест
Slovakjedenásť
Sloveneenajst
Spanish once
Swahilikumi na moja
Swedishelva
Thaiสิบ​เอ็ด
Turkishon bir
Ukrainianодинадцять
Vietnamesemười một
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Miscellaneous

Number 11 reversed11
ASCII Code11
Unicode CharacterU+000B
Unix TimestampThu, 01 Jan 1970 00:00:11 +0000
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