The number 11
Greek numeral: ιαʹ
Arabic numeral: ١١
Roman numeral: XI
Numeral systems
Binary: 1011
Septimal (base 7): 14
Octal: 13
Hexadecimal: b
Factorization
11 is a prime number (Gaussian prime)
Sums & differences
Difference of 2 squares: 11 = 62 - 52
Related primes
The 11th prime number is:
31Previous prime number:
7 — Next prime number:
13This number is a twin prime, the other twin is
13
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