222221110121 has 4 divisors (see below), whose sum is σ = 222222831744. Its totient is φ = 222219388500.

The previous prime is 222221110109. The next prime is 222221110127. The reversal of 222221110121 is 121011122222.

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 222221110121 - 2⁶ = 222221110057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222221110121.

It is not an unprimeable number, because it can be changed into a prime (222221110127) 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, 649985 + ... + 931086.

It is an arithmetic number, because the mean of its divisors is an integer number (55555707936).

Almost surely, 2^222221110121 is an apocalyptic number.

It is an amenable number.

222221110121 is a deficient number, since it is larger than the sum of its proper divisors (1721623).

222221110121 is a wasteful number, since it uses less digits than its factorization.

222221110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721622.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 222221110121 its reverse (121011122222), we get a palindrome (343232232343).

The spelling of 222221110121 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred ten thousand, one hundred twenty-one".