312021231000 has 128 divisors (see below), whose sum is σ = 1004909967360. Its totient is φ = 80521584000.

The previous prime is 312021230953. The next prime is 312021231023. The reversal of 312021231000 is 132120213.

It is a super-2 number, since 2×312021231000² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 1584534 + ... + 1770533.

It is an arithmetic number, because the mean of its divisors is an integer number (7850859120).

Almost surely, 2^312021231000 is an apocalyptic number.

312021231000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312021231000 is an abundant number, since it is smaller than the sum of its proper divisors (692888736360).

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

312021231000 is a wasteful number, since it uses less digits than its factorization.

312021231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355122 (or 3355108 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 312021231000 its reverse (132120213), we get a palindrome (312153351213).

The spelling of 312021231000 in words is "three hundred twelve billion, twenty-one million, two hundred thirty-one thousand".