31200021120112 has 80 divisors (see below), whose sum is σ = 65227260813120. Its totient is φ = 14371886592000.

The previous prime is 31200021120089. The next prime is 31200021120113. The reversal of 31200021120112 is 21102112000213.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200021120113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367583214 + ... + 367668082.

It is an arithmetic number, because the mean of its divisors is an integer number (815340760164).

Almost surely, 2^{31200021120112} is an apocalyptic number.

It is an amenable number.

31200021120112 is an abundant number, since it is smaller than the sum of its proper divisors (34027239693008).

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

31200021120112 is a wasteful number, since it uses less digits than its factorization.

31200021120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88322 (or 88316 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31200021120112 its reverse (21102112000213), we get a palindrome (52302133120325).

The spelling of 31200021120112 in words is "thirty-one trillion, two hundred billion, twenty-one million, one hundred twenty thousand, one hundred twelve".