222123321221 has 8 divisors (see below), whose sum is σ = 228447511488. Its totient is φ = 215842300000.

The previous prime is 222123321193. The next prime is 222123321229. The reversal of 222123321221 is 122123321222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222123321221 - 2⁶ = 222123321157 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 (222123321229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10781825 + ... + 10802406.

It is an arithmetic number, because the mean of its divisors is an integer number (28555938936).

Almost surely, 2^222123321221 is an apocalyptic number.

It is an amenable number.

222123321221 is a deficient number, since it is larger than the sum of its proper divisors (6324190267).

222123321221 is a wasteful number, since it uses less digits than its factorization.

222123321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21584523.

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

Adding to 222123321221 its reverse (122123321222), we get a palindrome (344246642443).

Subtracting from 222123321221 its reverse (122123321222), we obtain a palindrome (99999999999).

It can be divided in two parts, 22212 and 3321221, that added together give a palindrome (3343433).

The spelling of 222123321221 in words is "two hundred twenty-two billion, one hundred twenty-three million, three hundred twenty-one thousand, two hundred twenty-one".