321242513220 has 96 divisors (see below), whose sum is σ = 1005198445440. Its totient is φ = 85169473920.

The previous prime is 321242513201. The next prime is 321242513279. The reversal of 321242513220 is 22315242123.

321242513220 is a `hidden beast` number, since 3 + 2 + 1 + 2 + 425 + 13 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1625926 + ... + 1812765.

It is an arithmetic number, because the mean of its divisors is an integer number (10470817140).

Almost surely, 2^321242513220 is an apocalyptic number.

321242513220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321242513220 is an abundant number, since it is smaller than the sum of its proper divisors (683955932220).

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

321242513220 is a wasteful number, since it uses less digits than its factorization.

321242513220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438882 (or 3438874 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 321242513220 its reverse (22315242123), we get a palindrome (343557755343).

The spelling of 321242513220 in words is "three hundred twenty-one billion, two hundred forty-two million, five hundred thirteen thousand, two hundred twenty".