222123012321 has 128 divisors (see below), whose sum is σ = 368636313600. Its totient is φ = 116170640640.

The previous prime is 222123012311. The next prime is 222123012361. The reversal of 222123012321 is 123210321222.

It is not a de Polignac number, because 222123012321 - 2²⁶ = 222055903457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (222123012311) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 410578311 + ... + 410578851.

It is an arithmetic number, because the mean of its divisors is an integer number (2879971200).

Almost surely, 2^222123012321 is an apocalyptic number.

222123012321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222123012321 is a deficient number, since it is larger than the sum of its proper divisors (146513301279).

222123012321 is a wasteful number, since it uses less digits than its factorization.

222123012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 222123012321 its reverse (123210321222), we get a palindrome (345333333543).

The spelling of 222123012321 in words is "two hundred twenty-two billion, one hundred twenty-three million, twelve thousand, three hundred twenty-one".