231310120031 has 12 divisors (see below), whose sum is σ = 240828444360. Its totient is φ = 222101374320.

The previous prime is 231310119991. The next prime is 231310120091. The reversal of 231310120031 is 130021013132.

It is not a de Polignac number, because 231310120031 - 2⁶ = 231310119967 is a prime.

It is a super-2 number, since 2×231310120031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231310119991 and 231310120009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231310120091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 951080 + ... + 1169261.

It is an arithmetic number, because the mean of its divisors is an integer number (20069037030).

Almost surely, 2^231310120031 is an apocalyptic number.

231310120031 is a deficient number, since it is larger than the sum of its proper divisors (9518324329).

231310120031 is an equidigital number, since it uses as much as digits as its factorization.

231310120031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120486 (or 2120443 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 231310120031 its reverse (130021013132), we get a palindrome (361331133163).

The spelling of 231310120031 in words is "two hundred thirty-one billion, three hundred ten million, one hundred twenty thousand, thirty-one".