31013031203120 has 40 divisors (see below), whose sum is σ = 72105634609200. Its totient is φ = 12405154492160.

The previous prime is 31013031203113. The next prime is 31013031203131. The reversal of 31013031203120 is 2130213031013.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31013031203092 and 31013031203101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19042706 + ... + 20607054.

It is an arithmetic number, because the mean of its divisors is an integer number (1802640865230).

Almost surely, 2^{31013031203120} is an apocalyptic number.

It is an amenable number.

31013031203120 is an abundant number, since it is smaller than the sum of its proper divisors (41092603406080).

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

31013031203120 is a wasteful number, since it uses less digits than its factorization.

31013031203120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812173 (or 1812167 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31013031203120 its reverse (2130213031013), we get a palindrome (33143244234133).

The spelling of 31013031203120 in words is "thirty-one trillion, thirteen billion, thirty-one million, two hundred three thousand, one hundred twenty".