31212100112320 has 56 divisors (see below), whose sum is σ = 78695802429264. Its totient is φ = 11750437687296.

The previous prime is 31212100112299. The next prime is 31212100112329. The reversal of 31212100112320 is 2321100121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212100112329) 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, 2868753762 + ... + 2868764641.

Almost surely, 2^{31212100112320} is an apocalyptic number.

It is an amenable number.

31212100112320 is an abundant number, since it is smaller than the sum of its proper divisors (47483702316944).

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

31212100112320 is a wasteful number, since it uses less digits than its factorization.

31212100112320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5737518437 (or 5737518427 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31212100112320 its reverse (2321100121213), we get a palindrome (33533200233533).

The spelling of 31212100112320 in words is "thirty-one trillion, two hundred twelve billion, one hundred million, one hundred twelve thousand, three hundred twenty".