321320023203 has 4 divisors (see below), whose sum is σ = 428426697608. Its totient is φ = 214213348800.

The previous prime is 321320023181. The next prime is 321320023273. The reversal of 321320023203 is 302320023123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302320023123 = 3 ⋅100773341041.

It is a de Polignac number, because none of the positive numbers 2^k-321320023203 is a prime.

It is a super-2 number, since 2×321320023203² (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 321320023203.

It is not an unprimeable number, because it can be changed into a prime (321320023273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53553337198 + ... + 53553337203.

It is an arithmetic number, because the mean of its divisors is an integer number (107106674402).

Almost surely, 2^321320023203 is an apocalyptic number.

321320023203 is a deficient number, since it is larger than the sum of its proper divisors (107106674405).

321320023203 is a wasteful number, since it uses less digits than its factorization.

321320023203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107106674404.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 321320023203 its reverse (302320023123), we get a palindrome (623640046326).

The spelling of 321320023203 in words is "three hundred twenty-one billion, three hundred twenty million, twenty-three thousand, two hundred three".