11323312131 has 32 divisors (see below), whose sum is σ = 16058131200. Its totient is φ = 7083780480.

The previous prime is 11323312109. The next prime is 11323312139. The reversal of 11323312131 is 13121332311.

It is a happy number.

It is not a de Polignac number, because 11323312131 - 2⁷ = 11323312003 is a prime.

It is a super-2 number, since 2×11323312131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11323312098 and 11323312107.

It is not an unprimeable number, because it can be changed into a prime (11323312139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4695316 + ... + 4697726.

It is an arithmetic number, because the mean of its divisors is an integer number (501816600).

Almost surely, 2^11323312131 is an apocalyptic number.

11323312131 is a deficient number, since it is larger than the sum of its proper divisors (4734819069).

11323312131 is a wasteful number, since it uses less digits than its factorization.

11323312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939.

The product of its digits is 324, while the sum is 21.

Adding to 11323312131 its reverse (13121332311), we get a palindrome (24444644442).

The spelling of 11323312131 in words is "eleven billion, three hundred twenty-three million, three hundred twelve thousand, one hundred thirty-one".