31213121350204 has 18 divisors (see below), whose sum is σ = 55922805720600. Its totient is φ = 15243617399976.

The previous prime is 31213121350199. The next prime is 31213121350223. The reversal of 31213121350204 is 40205312131213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2110127904 + ... + 2110142695.

Almost surely, 2^{31213121350204} is an apocalyptic number.

It is an amenable number.

31213121350204 is a deficient number, since it is larger than the sum of its proper divisors (24709684370396).

31213121350204 is a wasteful number, since it uses less digits than its factorization.

31213121350204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220270689 (or 4220270644 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 31213121350204 its reverse (40205312131213), we get a palindrome (71418433481417).

The spelling of 31213121350204 in words is "thirty-one trillion, two hundred thirteen billion, one hundred twenty-one million, three hundred fifty thousand, two hundred four".