321312202231 has 4 divisors (see below), whose sum is σ = 321315538600. Its totient is φ = 321308865864.

The previous prime is 321312202213. The next prime is 321312202297. The reversal of 321312202231 is 132202213123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321312202231 - 2⁵ = 321312202199 is a prime.

It is a super-2 number, since 2×321312202231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321312203231) 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, 1519296 + ... + 1717813.

It is an arithmetic number, because the mean of its divisors is an integer number (80328884650).

Almost surely, 2^321312202231 is an apocalyptic number.

321312202231 is a deficient number, since it is larger than the sum of its proper divisors (3336369).

321312202231 is an equidigital number, since it uses as much as digits as its factorization.

321312202231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336368.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 321312202231 its reverse (132202213123), we get a palindrome (453514415354).

The spelling of 321312202231 in words is "three hundred twenty-one billion, three hundred twelve million, two hundred two thousand, two hundred thirty-one".