222321123221 has 4 divisors (see below), whose sum is σ = 224479580832. Its totient is φ = 220162665612.

The previous prime is 222321123163. The next prime is 222321123257. The reversal of 222321123221 is 122321123222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222321123221 - 2²² = 222316928917 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 (222321123721) 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, 1079228651 + ... + 1079228856.

It is an arithmetic number, because the mean of its divisors is an integer number (56119895208).

Almost surely, 2^222321123221 is an apocalyptic number.

It is an amenable number.

222321123221 is a deficient number, since it is larger than the sum of its proper divisors (2158457611).

222321123221 is a wasteful number, since it uses less digits than its factorization.

222321123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158457610.

The product of its digits is 1152, while the sum is 23.

Adding to 222321123221 its reverse (122321123222), we get a palindrome (344642246443).

Subtracting from 222321123221 its reverse (122321123222), we obtain a palindrome (99999999999).

The spelling of 222321123221 in words is "two hundred twenty-two billion, three hundred twenty-one million, one hundred twenty-three thousand, two hundred twenty-one".