323121031312 has 20 divisors (see below), whose sum is σ = 647634826620. Its totient is φ = 155989463168.

The previous prime is 323121031217. The next prime is 323121031333. The reversal of 323121031312 is 213130121323.

It can be written as a sum of positive squares in 2 ways, for example, as 110253217936 + 212867813376 = 332044^2 + 461376^2 .

It is a super-2 number, since 2×323121031312² (a number of 24 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 348190303 + ... + 348191230.

It is an arithmetic number, because the mean of its divisors is an integer number (32381741331).

Almost surely, 2^323121031312 is an apocalyptic number.

It is an amenable number.

323121031312 is an abundant number, since it is smaller than the sum of its proper divisors (324513795308).

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

323121031312 is a wasteful number, since it uses less digits than its factorization.

323121031312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696381570 (or 696381564 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 323121031312 its reverse (213130121323), we get a palindrome (536251152635).

The spelling of 323121031312 in words is "three hundred twenty-three billion, one hundred twenty-one million, thirty-one thousand, three hundred twelve".