320321021211220 has 72 divisors (see below), whose sum is σ = 725769468900000. Its totient is φ = 118424202727680.

The previous prime is 320321021211209. The next prime is 320321021211263. The reversal of 320321021211220 is 22112120123023.

It is a junction number, because it is equal to n+sod(n) for n = 320321021211191 and 320321021211200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250089970 + ... + 251367529.

It is an arithmetic number, because the mean of its divisors is an integer number (10080131512500).

Almost surely, 2^{320321021211220} is an apocalyptic number.

It is an amenable number.

320321021211220 is an abundant number, since it is smaller than the sum of its proper divisors (405448447688780).

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

320321021211220 is a wasteful number, since it uses less digits than its factorization.

320321021211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501457609 (or 501457566 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 320321021211220 its reverse (22112120123023), we get a palindrome (342433141334243).

The spelling of 320321021211220 in words is "three hundred twenty trillion, three hundred twenty-one billion, twenty-one million, two hundred eleven thousand, two hundred twenty".