321320000220 has 48 divisors (see below), whose sum is σ = 904666727328. Its totient is φ = 85211930880.

The previous prime is 321320000213. The next prime is 321320000231. The reversal of 321320000220 is 22000023123.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 321320000220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14782879 + ... + 14804598.

It is an arithmetic number, because the mean of its divisors is an integer number (18847223486).

Almost surely, 2^321320000220 is an apocalyptic number.

321320000220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321320000220 is an abundant number, since it is smaller than the sum of its proper divisors (583346727108).

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

321320000220 is a wasteful number, since it uses less digits than its factorization.

321320000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29587670 (or 29587668 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 321320000220 its reverse (22000023123), we get a palindrome (343320023343).

The spelling of 321320000220 in words is "three hundred twenty-one billion, three hundred twenty million, two hundred twenty", and thus it is an aban number.