231312013102131 has 24 divisors (see below), whose sum is σ = 335153762078256. Its totient is φ = 141839285253120.

The previous prime is 231312013102127. The next prime is 231312013102147. The reversal of 231312013102131 is 131201310213132.

It is not a de Polignac number, because 231312013102131 - 2² = 231312013102127 is a prime.

It is a super-2 number, since 2×231312013102131² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231312013100131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 811666630 + ... + 811951563.

It is an arithmetic number, because the mean of its divisors is an integer number (13964740086594).

Almost surely, 2^{231312013102131} is an apocalyptic number.

231312013102131 is a deficient number, since it is larger than the sum of its proper divisors (103841748976125).

231312013102131 is a wasteful number, since it uses less digits than its factorization.

231312013102131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623618503 (or 1623618490 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 231312013102131 its reverse (131201310213132), we get a palindrome (362513323315263).

The spelling of 231312013102131 in words is "two hundred thirty-one trillion, three hundred twelve billion, thirteen million, one hundred two thousand, one hundred thirty-one".