3131332121000 has 32 divisors (see below), whose sum is σ = 7327317165480. Its totient is φ = 1252532848000.

The previous prime is 3131332120937. The next prime is 3131332121017. The reversal of 3131332121000 is 1212331313.

It can be written as a sum of positive squares in 4 ways, for example, as 801880848484 + 2329451272516 = 895478^2 + 1526254^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 1565665061 + ... + 1565667060.

Almost surely, 2^{3131332121000} is an apocalyptic number.

It is an amenable number.

3131332121000 is an abundant number, since it is smaller than the sum of its proper divisors (4195985044480).

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

3131332121000 is a wasteful number, since it uses less digits than its factorization.

3131332121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131332142 (or 3131332128 counting only the distinct ones).

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

Adding to 3131332121000 its reverse (1212331313), we get a palindrome (3132544452313).

The spelling of 3131332121000 in words is "three trillion, one hundred thirty-one billion, three hundred thirty-two million, one hundred twenty-one thousand".