222121120321 has 4 divisors (see below), whose sum is σ = 222149127892. Its totient is φ = 222093112752.

The previous prime is 222121120279. The next prime is 222121120349. The reversal of 222121120321 is 123021121222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62680630321 + 159440490000 = 250361^2 + 399300^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121120321 - 2¹⁷ = 222120989249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121120381) 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, 13991886 + ... + 14007751.

It is an arithmetic number, because the mean of its divisors is an integer number (55537281973).

Almost surely, 2^222121120321 is an apocalyptic number.

It is an amenable number.

222121120321 is a deficient number, since it is larger than the sum of its proper divisors (28007571).

222121120321 is an equidigital number, since it uses as much as digits as its factorization.

222121120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28007570.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 222121120321 its reverse (123021121222), we get a palindrome (345142241543).

Subtracting from 222121120321 its reverse (123021121222), we obtain a palindrome (99099999099).

The spelling of 222121120321 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, three hundred twenty-one".