11231311256 has 32 divisors (see below), whose sum is σ = 24324500880. Its totient is φ = 4804838400.

The previous prime is 11231311241. The next prime is 11231311283. The reversal of 11231311256 is 65211313211.

It is a super-2 number, since 2×11231311256² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3752285 + ... + 3755276.

Almost surely, 2^11231311256 is an apocalyptic number.

It is an amenable number.

11231311256 is an abundant number, since it is smaller than the sum of its proper divisors (13093189624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11231311256 is a wasteful number, since it uses less digits than its factorization.

11231311256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507595 (or 7507591 counting only the distinct ones).

The product of its digits is 1080, while the sum is 26.

Adding to 11231311256 its reverse (65211313211), we get a palindrome (76442624467).

The spelling of 11231311256 in words is "eleven billion, two hundred thirty-one million, three hundred eleven thousand, two hundred fifty-six".