321312020232 has 48 divisors (see below), whose sum is σ = 934427817360. Its totient is φ = 91803434016.

The previous prime is 321312020219. The next prime is 321312020233. The reversal of 321312020232 is 232020213123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 321312020199 and 321312020208.

It is not an unprimeable number, because it can be changed into a prime (321312020233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136611078 + ... + 136613429.

It is an arithmetic number, because the mean of its divisors is an integer number (19467246195).

Almost surely, 2^321312020232 is an apocalyptic number.

It is an amenable number.

321312020232 is an abundant number, since it is smaller than the sum of its proper divisors (613115797128).

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

321312020232 is a wasteful number, since it uses less digits than its factorization.

321312020232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273224530 (or 273224519 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 321312020232 its reverse (232020213123), we get a palindrome (553332233355).

The spelling of 321312020232 in words is "three hundred twenty-one billion, three hundred twelve million, twenty thousand, two hundred thirty-two".