321131320303 has 4 divisors (see below), whose sum is σ = 338032968760. Its totient is φ = 304229671848.

The previous prime is 321131320297. The next prime is 321131320333. The reversal of 321131320303 is 303023131123.

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

It is a de Polignac number, because none of the positive numbers 2^k-321131320303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321131320333) 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, 8450824200 + ... + 8450824237.

It is an arithmetic number, because the mean of its divisors is an integer number (84508242190).

Almost surely, 2^321131320303 is an apocalyptic number.

321131320303 is a deficient number, since it is larger than the sum of its proper divisors (16901648457).

321131320303 is a wasteful number, since it uses less digits than its factorization.

321131320303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16901648456.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 321131320303 its reverse (303023131123), we get a palindrome (624154451426).

The spelling of 321131320303 in words is "three hundred twenty-one billion, one hundred thirty-one million, three hundred twenty thousand, three hundred three".