31220003113013 has 32 divisors (see below), whose sum is σ = 37347322247424. Its totient is φ = 25939210440000.

The previous prime is 31220003113009. The next prime is 31220003113021. The reversal of 31220003113013 is 31031130002213.

It is not a de Polignac number, because 31220003113013 - 2² = 31220003113009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220003113093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7184633 + ... + 10679838.

It is an arithmetic number, because the mean of its divisors is an integer number (1167103820232).

Almost surely, 2^{31220003113013} is an apocalyptic number.

It is an amenable number.

31220003113013 is a deficient number, since it is larger than the sum of its proper divisors (6127319134411).

31220003113013 is a wasteful number, since it uses less digits than its factorization.

31220003113013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17864618 (or 17864596 counting only the distinct ones).

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

Adding to 31220003113013 its reverse (31031130002213), we get a palindrome (62251133115226).

The spelling of 31220003113013 in words is "thirty-one trillion, two hundred twenty billion, three million, one hundred thirteen thousand, thirteen".