31212013199992 has 32 divisors (see below), whose sum is σ = 59280899857200. Its totient is φ = 15404370682624.

The previous prime is 31212013199987. The next prime is 31212013199993. The reversal of 31212013199992 is 29999131021213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212013199993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36922003 + ... + 37757890.

Almost surely, 2^{31212013199992} is an apocalyptic number.

It is an amenable number.

31212013199992 is a deficient number, since it is larger than the sum of its proper divisors (28068886657208).

31212013199992 is a wasteful number, since it uses less digits than its factorization.

31212013199992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74680575 (or 74680571 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 52.

The spelling of 31212013199992 in words is "thirty-one trillion, two hundred twelve billion, thirteen million, one hundred ninety-nine thousand, nine hundred ninety-two".