312021233320 has 64 divisors (see below), whose sum is σ = 714185942400. Its totient is φ = 122652015360.

The previous prime is 312021233299. The next prime is 312021233323. The reversal of 312021233320 is 23332120213.

It is a junction number, because it is equal to n+sod(n) for n = 312021233291 and 312021233300.

It is not an unprimeable number, because it can be changed into a prime (312021233323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7581037 + ... + 7622083.

It is an arithmetic number, because the mean of its divisors is an integer number (11159155350).

Almost surely, 2^312021233320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312021233320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357092971200).

312021233320 is an abundant number, since it is smaller than the sum of its proper divisors (402164709080).

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

312021233320 is a wasteful number, since it uses less digits than its factorization.

312021233320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44338 (or 44334 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 312021233320 its reverse (23332120213), we get a palindrome (335353353533).

The spelling of 312021233320 in words is "three hundred twelve billion, twenty-one million, two hundred thirty-three thousand, three hundred twenty".