323220120021 has 24 divisors (see below), whose sum is σ = 481290600960. Its totient is φ = 208926098496.

The previous prime is 323220120017. The next prime is 323220120059. The reversal of 323220120021 is 120021022323.

323220120021 is a `hidden beast` number, since 323 + 220 + 120 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 323220120021 - 2² = 323220120017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 323220119976 and 323220120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323220120071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4130421 + ... + 4207946.

It is an arithmetic number, because the mean of its divisors is an integer number (20053775040).

Almost surely, 2^323220120021 is an apocalyptic number.

It is an amenable number.

323220120021 is a deficient number, since it is larger than the sum of its proper divisors (158070480939).

323220120021 is a wasteful number, since it uses less digits than its factorization.

323220120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8338505 (or 8338502 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 323220120021 its reverse (120021022323), we get a palindrome (443241142344).

The spelling of 323220120021 in words is "three hundred twenty-three billion, two hundred twenty million, one hundred twenty thousand, twenty-one".