323121120520 has 64 divisors (see below), whose sum is σ = 793174032000. Its totient is φ = 117489914880.

The previous prime is 323121120493. The next prime is 323121120547. The reversal of 323121120520 is 25021121323.

It is an interprime number because it is at equal distance from previous prime (323121120493) and next prime (323121120547).

It is a super-2 number, since 2×323121120520² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 323121120491 and 323121120500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11609581 + ... + 11637379.

It is an arithmetic number, because the mean of its divisors is an integer number (12393344250).

Almost surely, 2^323121120520 is an apocalyptic number.

It is an amenable number.

323121120520 is an abundant number, since it is smaller than the sum of its proper divisors (470052911480).

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

323121120520 is a wasteful number, since it uses less digits than its factorization.

323121120520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54238 (or 54234 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 323121120520 its reverse (25021121323), we get a palindrome (348142241843).

The spelling of 323121120520 in words is "three hundred twenty-three billion, one hundred twenty-one million, one hundred twenty thousand, five hundred twenty".