312131122320 has 160 divisors (see below), whose sum is σ = 975776617728. Its totient is φ = 82533556224.

The previous prime is 312131122283. The next prime is 312131122337. The reversal of 312131122320 is 23221131213.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31790052 + ... + 31799868.

Almost surely, 2^312131122320 is an apocalyptic number.

312131122320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312131122320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487888308864).

312131122320 is an abundant number, since it is smaller than the sum of its proper divisors (663645495408).

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

312131122320 is a wasteful number, since it uses less digits than its factorization.

312131122320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10937 (or 10931 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312131122320 its reverse (23221131213), we get a palindrome (335352253533).

The spelling of 312131122320 in words is "three hundred twelve billion, one hundred thirty-one million, one hundred twenty-two thousand, three hundred twenty".