123531505515112 has 32 divisors (see below), whose sum is σ = 239642547602400. Its totient is φ = 59627431025344.

The previous prime is 123531505515073. The next prime is 123531505515151. The reversal of 123531505515112 is 211515505135321.

It is an interprime number because it is at equal distance from previous prime (123531505515073) and next prime (123531505515151).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36166918 + ... + 39434869.

It is an arithmetic number, because the mean of its divisors is an integer number (7488829612575).

Almost surely, 2^{123531505515112} is an apocalyptic number.

It is an amenable number.

123531505515112 is a deficient number, since it is larger than the sum of its proper divisors (116111042087288).

123531505515112 is a wasteful number, since it uses less digits than its factorization.

123531505515112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75608865 (or 75608861 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 123531505515112 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, five hundred five million, five hundred fifteen thousand, one hundred twelve".