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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

 Nominal 11 Cardinal eleven Ordinal 11th Number of digits 2 Sum of digits 2 Product of digits 1 Number parity Odd
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Prime Factorization of 11

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

 List of proper divisors 1 List of all dividers 1, 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
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 11 3.31662 Natural Logarithm (ln) of 11 2.3979 Decimal Logarithm (log) of 11 1.04139
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Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
 Sine of 11 -0.99999 Cosecant of 11 -1.00001 Cosine of 11 0.0044257 Secant of 11 225.953 Tangent of 11 -225.951 Cotangent of 11 -0.00442574
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Number parity

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

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 numerals ১১ Eastern Arabic numerals ١١ Hieroglyphs numeralsused in Ancient Egypt 𓎆𓏺 Khmer numerals ១១ Japanese numerals 十一 Roman numerals XI Thai numerals ๑๑
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Translation

How do you say 11 in 38 different languages?
 Arabic إحدى عشر Croatian jedanaest Czech jedenáct Danish elleve Dutch elf Estonian wuiɖekɛ Faroese ellivu Filipino labíng-isá Finnish yksitoista French onze Greek έντεκα German elf Hebrew אחת עשרה Hindi ग्यारह Hungarian tizen­egy Icelandic ellefu Indonesian sebelas Italian undici Japanese 十一 Korean 십일 Latvian vienpadsmit Lithuanian vienuolika Norwegian elleve Persian یازده Polish jedenaście Portuguese onze Romanian unsprezece Russian одиннадцать Serbian једанаест Slovak jedenásť Slovene enajst Spanish once Swahili kumi na moja Swedish elva Thai สิบ​เอ็ด Turkish on bir Ukrainian одинадцять Vietnamese mười một
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Miscellaneous

 Number 11 reversed 11 ASCII Code 11 Unicode Character U+000B Unix Timestamp Thu, 01 Jan 1970 00:00:11 +0000
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