321221031023 has 4 divisors (see below), whose sum is σ = 321233316168. Its totient is φ = 321208745880.

The previous prime is 321221030951. The next prime is 321221031029. The reversal of 321221031023 is 320130122123.

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 321221031023 - 2¹⁰ = 321221029999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321221030986 and 321221031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321221031029) 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, 6103268 + ... + 6155673.

It is an arithmetic number, because the mean of its divisors is an integer number (80308329042).

Almost surely, 2^321221031023 is an apocalyptic number.

321221031023 is a deficient number, since it is larger than the sum of its proper divisors (12285145).

321221031023 is a wasteful number, since it uses less digits than its factorization.

321221031023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12285144.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 321221031023 its reverse (320130122123), we get a palindrome (641351153146).

The spelling of 321221031023 in words is "three hundred twenty-one billion, two hundred twenty-one million, thirty-one thousand, twenty-three".