321331322231 has 4 divisors (see below), whose sum is σ = 321427331352. Its totient is φ = 321235313112.

The previous prime is 321331322203. The next prime is 321331322233. The reversal of 321331322231 is 132223133123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132223133123 = 36479 ⋅3624637.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321331322231 is a prime.

It is a super-2 number, since 2×321331322231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321331322231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321331322233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47999540 + ... + 48006233.

It is an arithmetic number, because the mean of its divisors is an integer number (80356832838).

Almost surely, 2^321331322231 is an apocalyptic number.

321331322231 is a deficient number, since it is larger than the sum of its proper divisors (96009121).

321331322231 is an equidigital number, since it uses as much as digits as its factorization.

321331322231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96009120.

The product of its digits is 3888, while the sum is 26.

Adding to 321331322231 its reverse (132223133123), we get a palindrome (453554455354).

The spelling of 321331322231 in words is "three hundred twenty-one billion, three hundred thirty-one million, three hundred twenty-two thousand, two hundred thirty-one".