Eleven

11 is an odd number.

11 is a prime number, which means it is only divisible by 1 and itself.

11 is a palindrome.

11 is a Sophie Germain prime, which means that 2 x 11 + 1 = 23 is also a prime number.

In binary, 11 is represented as 1011.

In hex, 11 is represented as b.

Prime factorization of 11: 11.