56221812120 has 64 divisors (see below), whose sum is σ = 169099164000. Its totient is φ = 14953929728.

The previous prime is 56221812113. The next prime is 56221812161. The reversal of 56221812120 is 2121812265.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555525 + ... + 648884.

Almost surely, 2^56221812120 is an apocalyptic number.

It is an amenable number.

56221812120 is an abundant number, since it is smaller than the sum of its proper divisors (112877351880).

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

56221812120 is a wasteful number, since it uses less digits than its factorization.

56221812120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204812 (or 1204808 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The spelling of 56221812120 in words is "fifty-six billion, two hundred twenty-one million, eight hundred twelve thousand, one hundred twenty".