31311012020200 has 96 divisors (see below), whose sum is σ = 79469743878720. Its totient is φ = 11378133440000.

The previous prime is 31311012020131. The next prime is 31311012020201. The reversal of 31311012020200 is 202021011313.

It is not an unprimeable number, because it can be changed into a prime (31311012020201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1546756 + ... + 8063155.

It is an arithmetic number, because the mean of its divisors is an integer number (827809832070).

Almost surely, 2^{31311012020200} is an apocalyptic number.

It is an amenable number.

31311012020200 is an abundant number, since it is smaller than the sum of its proper divisors (48158731858520).

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

31311012020200 is a wasteful number, since it uses less digits than its factorization.

31311012020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9611419 (or 9611410 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31311012020200 its reverse (202021011313), we get a palindrome (31513033031513).

The spelling of 31311012020200 in words is "thirty-one trillion, three hundred eleven billion, twelve million, twenty thousand, two hundred".