321100133220 has 72 divisors (see below), whose sum is σ = 974053953600. Its totient is φ = 85622287680.

The previous prime is 321100133219. The next prime is 321100133231. The reversal of 321100133220 is 22331001123.

321100133220 is a `hidden beast` number, since 321 + 10 + 0 + 1 + 332 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 321100133193 and 321100133202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4971735 + ... + 5035905.

Almost surely, 2^321100133220 is an apocalyptic number.

321100133220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321100133220 is an abundant number, since it is smaller than the sum of its proper divisors (652953820380).

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

321100133220 is a wasteful number, since it uses less digits than its factorization.

321100133220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91985 (or 91980 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 321100133220 its reverse (22331001123), we get a palindrome (343431134343).

The spelling of 321100133220 in words is "three hundred twenty-one billion, one hundred million, one hundred thirty-three thousand, two hundred twenty".