3131320200020 has 24 divisors (see below), whose sum is σ = 6576289876968. Its totient is φ = 1252429516800.

The previous prime is 3131320200007. The next prime is 3131320200031. The reversal of 3131320200020 is 200020231313.

It can be written as a sum of positive squares in 4 ways, for example, as 1108223609284 + 2023096590736 = 1052722^2 + 1422356^2 .

It is a congruent number.

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, 5899421 + ... + 6408260.

It is an arithmetic number, because the mean of its divisors is an integer number (274012078207).

Almost surely, 2^{3131320200020} is an apocalyptic number.

It is an amenable number.

3131320200020 is an abundant number, since it is smaller than the sum of its proper divisors (3444969676948).

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

3131320200020 is a wasteful number, since it uses less digits than its factorization.

3131320200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12320411 (or 12320409 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 3131320200020 its reverse (200020231313), we get a palindrome (3331340431333).

The spelling of 3131320200020 in words is "three trillion, one hundred thirty-one billion, three hundred twenty million, two hundred thousand, twenty".