123031132312 has 16 divisors (see below), whose sum is σ = 251654589000. Its totient is φ = 55923241920.

The previous prime is 123031132229. The next prime is 123031132313. The reversal of 123031132312 is 213231130321.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031132313) 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, 699040437 + ... + 699040612.

Almost surely, 2^123031132312 is an apocalyptic number.

It is an amenable number.

123031132312 is an abundant number, since it is smaller than the sum of its proper divisors (128623456688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123031132312 is a wasteful number, since it uses less digits than its factorization.

123031132312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398081066 (or 1398081062 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 123031132312 its reverse (213231130321), we get a palindrome (336262262633).

The spelling of 123031132312 in words is "one hundred twenty-three billion, thirty-one million, one hundred thirty-two thousand, three hundred twelve".