123031323112312 has 16 divisors (see below), whose sum is σ = 230691993861600. Its totient is φ = 61513458082560.

The previous prime is 123031323112283. The next prime is 123031323112319. The reversal of 123031323112312 is 213211323130321.

It is a super-2 number, since 2×123031323112312² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031323112319) 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, 275196889 + ... + 275643592.

It is an arithmetic number, because the mean of its divisors is an integer number (14418249616350).

Almost surely, 2^{123031323112312} is an apocalyptic number.

It is an amenable number.

123031323112312 is a deficient number, since it is larger than the sum of its proper divisors (107660670749288).

123031323112312 is a wasteful number, since it uses less digits than its factorization.

123031323112312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550868406 (or 550868402 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 123031323112312 its reverse (213211323130321), we get a palindrome (336242646242633).

The spelling of 123031323112312 in words is "one hundred twenty-three trillion, thirty-one billion, three hundred twenty-three million, one hundred twelve thousand, three hundred twelve".