31221133130200 has 96 divisors (see below), whose sum is σ = 78248596456800. Its totient is φ = 11516642472960.

The previous prime is 31221133130189. The next prime is 31221133130219. The reversal of 31221133130200 is 203133112213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3126460 + ... + 8498059.

It is an arithmetic number, because the mean of its divisors is an integer number (815089546425).

Almost surely, 2^{31221133130200} is an apocalyptic number.

It is an amenable number.

31221133130200 is an abundant number, since it is smaller than the sum of its proper divisors (47027463326600).

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

31221133130200 is a wasteful number, since it uses less digits than its factorization.

31221133130200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11625581 (or 11625572 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31221133130200 its reverse (203133112213), we get a palindrome (31424266242413).

The spelling of 31221133130200 in words is "thirty-one trillion, two hundred twenty-one billion, one hundred thirty-three million, one hundred thirty thousand, two hundred".