31311021130000 has 100 divisors (see below), whose sum is σ = 76036145807248. Its totient is φ = 12486569040000.

The previous prime is 31311021129953. The next prime is 31311021130079. The reversal of 31311021130000 is 3112011313.

It is a tau number, because it is divible by the number of its divisors (100).

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1419762 + ... + 8039761.

Almost surely, 2^{31311021130000} is an apocalyptic number.

It is an amenable number.

31311021130000 is an abundant number, since it is smaller than the sum of its proper divisors (44725124677248).

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

31311021130000 is an equidigital number, since it uses as much as digits as its factorization.

31311021130000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9459882 (or 9459861 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31311021130000 its reverse (3112011313), we get a palindrome (31314133141313).

The spelling of 31311021130000 in words is "thirty-one trillion, three hundred eleven billion, twenty-one million, one hundred thirty thousand".