11311211129 has 2 divisors, whose sum is σ = 11311211130. Its totient is φ = 11311211128.

The previous prime is 11311211083. The next prime is 11311211141. The reversal of 11311211129 is 92111211311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8956729600 + 2354481529 = 94640^2 + 48523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11311211129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11311211629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655605564 + 5655605565.

It is an arithmetic number, because the mean of its divisors is an integer number (5655605565).

Almost surely, 2^11311211129 is an apocalyptic number.

It is an amenable number.

11311211129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311211129 is an equidigital number, since it uses as much as digits as its factorization.

11311211129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 23.

The spelling of 11311211129 in words is "eleven billion, three hundred eleven million, two hundred eleven thousand, one hundred twenty-nine".