31312123000 has 32 divisors (see below), whose sum is σ = 73270370160. Its totient is φ = 12524848800.

The previous prime is 31312122977. The next prime is 31312123009. The reversal of 31312123000 is 32121313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312123009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15655062 + ... + 15657061.

Almost surely, 2^31312123000 is an apocalyptic number.

It is an amenable number.

31312123000 is an abundant number, since it is smaller than the sum of its proper divisors (41958247160).

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

31312123000 is a wasteful number, since it uses less digits than its factorization.

31312123000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31312144 (or 31312130 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31312123000 its reverse (32121313), we get a palindrome (31344244313).

The spelling of 31312123000 in words is "thirty-one billion, three hundred twelve million, one hundred twenty-three thousand".