31310123012 has 48 divisors (see below), whose sum is σ = 63052752000. Its totient is φ = 13326246144.

The previous prime is 31310123003. The next prime is 31310123027. The reversal of 31310123012 is 21032101313.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2616539 + ... + 2628477.

It is an arithmetic number, because the mean of its divisors is an integer number (1313599000).

Almost surely, 2^31310123012 is an apocalyptic number.

It is an amenable number.

31310123012 is an abundant number, since it is smaller than the sum of its proper divisors (31742628988).

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

31310123012 is a wasteful number, since it uses less digits than its factorization.

31310123012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12588 (or 12586 counting only the distinct ones).

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

Adding to 31310123012 its reverse (21032101313), we get a palindrome (52342224325).

The spelling of 31310123012 in words is "thirty-one billion, three hundred ten million, one hundred twenty-three thousand, twelve".