31120130310220 has 24 divisors (see below), whose sum is σ = 74688312744864. Its totient is φ = 10669758963456.

The previous prime is 31120130310197. The next prime is 31120130310239. The reversal of 31120130310220 is 2201303102113.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111143322397 + ... + 111143322676.

It is an arithmetic number, because the mean of its divisors is an integer number (3112013031036).

Almost surely, 2^{31120130310220} is an apocalyptic number.

It is an amenable number.

31120130310220 is an abundant number, since it is smaller than the sum of its proper divisors (43568182434644).

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

31120130310220 is a wasteful number, since it uses less digits than its factorization.

31120130310220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222286645089 (or 222286645087 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31120130310220 its reverse (2201303102113), we get a palindrome (33321433412333).

The spelling of 31120130310220 in words is "thirty-one trillion, one hundred twenty billion, one hundred thirty million, three hundred ten thousand, two hundred twenty".