22112012121 has 16 divisors (see below), whose sum is σ = 30150641664. Its totient is φ = 14408209424.

The previous prime is 22112012119. The next prime is 22112012141. The reversal of 22112012121 is 12121021122.

It is a cyclic number.

It is not a de Polignac number, because 22112012121 - 2¹ = 22112012119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22112012121.

It is not an unprimeable number, because it can be changed into a prime (22112012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771 + ... + 210296.

It is an arithmetic number, because the mean of its divisors is an integer number (1884415104).

Almost surely, 2^22112012121 is an apocalyptic number.

It is an amenable number.

22112012121 is a deficient number, since it is larger than the sum of its proper divisors (8038629543).

22112012121 is a wasteful number, since it uses less digits than its factorization.

22112012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211860.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22112012121 its reverse (12121021122), we get a palindrome (34233033243).

Subtracting from 22112012121 its reverse (12121021122), we obtain a palindrome (9990990999).

The spelling of 22112012121 in words is "twenty-two billion, one hundred twelve million, twelve thousand, one hundred twenty-one".