222222242222221 has 16 divisors (see below), whose sum is σ = 227539222556800. Its totient is φ = 216912064174848.

The previous prime is 222222242222207. The next prime is 222222242222231. The reversal of 222222242222221 is 122222242222222.

It is a cyclic number.

It is not a de Polignac number, because 222222242222221 - 2⁷ = 222222242222093 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 (222222242222231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672793105 + ... + 673123321.

It is an arithmetic number, because the mean of its divisors is an integer number (14221201409800).

Almost surely, 2^{222222242222221} is an apocalyptic number.

It is an amenable number.

222222242222221 is a deficient number, since it is larger than the sum of its proper divisors (5316980334579).

222222242222221 is a wasteful number, since it uses less digits than its factorization.

222222242222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340468.

The product of its digits is 32768, while the sum is 31.

Adding to 222222242222221 its reverse (122222242222222), we get a palindrome (344444484444443).

Subtracting from 222222242222221 its reverse (122222242222222), we obtain a palindrome (99999999999999).

The spelling of 222222242222221 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, two hundred forty-two million, two hundred twenty-two thousand, two hundred twenty-one".