321232013220 has 48 divisors (see below), whose sum is σ = 912874269888. Its totient is φ = 84383333760.

The previous prime is 321232013213. The next prime is 321232013261. The reversal of 321232013220 is 22310232123.

It is a happy 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, 39950211 + ... + 39958250.

It is an arithmetic number, because the mean of its divisors is an integer number (19018213956).

Almost surely, 2^321232013220 is an apocalyptic number.

321232013220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321232013220 is an abundant number, since it is smaller than the sum of its proper divisors (591642256668).

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

321232013220 is a wasteful number, since it uses less digits than its factorization.

321232013220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79908540 (or 79908538 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 321232013220 its reverse (22310232123), we get a palindrome (343542245343).

The spelling of 321232013220 in words is "three hundred twenty-one billion, two hundred thirty-two million, thirteen thousand, two hundred twenty".