321131213232 has 20 divisors (see below), whose sum is σ = 829588967640. Its totient is φ = 107043737728.

The previous prime is 321131213209. The next prime is 321131213237. The reversal of 321131213232 is 232312131123.

It is a super-2 number, since 2×321131213232² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 (321131213237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3345116757 + ... + 3345116852.

It is an arithmetic number, because the mean of its divisors is an integer number (41479448382).

Almost surely, 2^321131213232 is an apocalyptic number.

It is an amenable number.

321131213232 is an abundant number, since it is smaller than the sum of its proper divisors (508457754408).

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

321131213232 is a wasteful number, since it uses less digits than its factorization.

321131213232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6690233620 (or 6690233614 counting only the distinct ones).

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

Adding to 321131213232 its reverse (232312131123), we get a palindrome (553443344355).

The spelling of 321131213232 in words is "three hundred twenty-one billion, one hundred thirty-one million, two hundred thirteen thousand, two hundred thirty-two".