321831116220 has 48 divisors (see below), whose sum is σ = 923105842848. Its totient is φ = 83728419840.

The previous prime is 321831116207. The next prime is 321831116237. The reversal of 321831116220 is 22611138123.

It is a super-2 number, since 2×321831116220² (a number of 24 digits) contains 22 as substring.

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, 65410369 + ... + 65415288.

It is an arithmetic number, because the mean of its divisors is an integer number (19231371726).

Almost surely, 2^321831116220 is an apocalyptic number.

321831116220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321831116220 is an abundant number, since it is smaller than the sum of its proper divisors (601274726628).

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

321831116220 is a wasteful number, since it uses less digits than its factorization.

321831116220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130825710 (or 130825708 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The spelling of 321831116220 in words is "three hundred twenty-one billion, eight hundred thirty-one million, one hundred sixteen thousand, two hundred twenty".