321312331212 has 96 divisors (see below), whose sum is σ = 768175349760. Its totient is φ = 104525467200.

The previous prime is 321312331201. The next prime is 321312331217. The reversal of 321312331212 is 212133213123.

It is a super-2 number, since 2×321312331212² (a number of 24 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (321312331217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 458362462 + ... + 458363162.

It is an arithmetic number, because the mean of its divisors is an integer number (8001826560).

Almost surely, 2^321312331212 is an apocalyptic number.

It is an amenable number.

321312331212 is an abundant number, since it is smaller than the sum of its proper divisors (446863018548).

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

321312331212 is an equidigital number, since it uses as much as digits as its factorization.

321312331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 900 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 321312331212 its reverse (212133213123), we get a palindrome (533445544335).

The spelling of 321312331212 in words is "three hundred twenty-one billion, three hundred twelve million, three hundred thirty-one thousand, two hundred twelve".