312122030320 has 80 divisors (see below), whose sum is σ = 763991994240. Its totient is φ = 118260110592.

The previous prime is 312122030303. The next prime is 312122030359. The reversal of 312122030320 is 23030221213.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×312122030320² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14890087 + ... + 14911033.

It is an arithmetic number, because the mean of its divisors is an integer number (9549899928).

Almost surely, 2^312122030320 is an apocalyptic number.

It is an amenable number.

312122030320 is an abundant number, since it is smaller than the sum of its proper divisors (451869963920).

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

312122030320 is a wasteful number, since it uses less digits than its factorization.

312122030320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30782 (or 30776 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 312122030320 its reverse (23030221213), we get a palindrome (335152251533).

The spelling of 312122030320 in words is "three hundred twelve billion, one hundred twenty-two million, thirty thousand, three hundred twenty".