31120203230020 has 24 divisors (see below), whose sum is σ = 65352571498368. Its totient is φ = 12448053727200.

The previous prime is 31120203229943. The next prime is 31120203230033. The reversal of 31120203230020 is 2003230202113.

It is a self number, because there is not a number n which added to its sum of digits gives 31120203230020.

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, 9234675 + ... + 12145765.

It is an arithmetic number, because the mean of its divisors is an integer number (2723023812432).

Almost surely, 2^{31120203230020} is an apocalyptic number.

It is an amenable number.

31120203230020 is an abundant number, since it is smaller than the sum of its proper divisors (34232368268348).

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

31120203230020 is a wasteful number, since it uses less digits than its factorization.

31120203230020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3445611 (or 3445609 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31120203230020 its reverse (2003230202113), we get a palindrome (33123433432133).

The spelling of 31120203230020 in words is "thirty-one trillion, one hundred twenty billion, two hundred three million, two hundred thirty thousand, twenty".