13112931131 has 4 divisors (see below), whose sum is σ = 13565101200. Its totient is φ = 12660761064.

The previous prime is 13112931109. The next prime is 13112931137. The reversal of 13112931131 is 13113921131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13113921131 = 8273 ⋅1585147.

It is a cyclic number.

It is not a de Polignac number, because 13112931131 - 2³⁰ = 12039189307 is a prime.

It is a super-2 number, since 2×13112931131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13112931131.

It is not an unprimeable number, because it can be changed into a prime (13112931137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226084991 + ... + 226085048.

It is an arithmetic number, because the mean of its divisors is an integer number (3391275300).

Almost surely, 2^13112931131 is an apocalyptic number.

13112931131 is a deficient number, since it is larger than the sum of its proper divisors (452170069).

13112931131 is an equidigital number, since it uses as much as digits as its factorization.

13112931131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452170068.

The product of its digits is 486, while the sum is 26.

The spelling of 13112931131 in words is "thirteen billion, one hundred twelve million, nine hundred thirty-one thousand, one hundred thirty-one".