22221211111 has 32 divisors (see below), whose sum is σ = 25334622720. Its totient is φ = 19305417600.

The previous prime is 22221211079. The next prime is 22221211157. The reversal of 22221211111 is 11111212222.

It is a cyclic number.

It is not a de Polignac number, because 22221211111 - 2⁵ = 22221211079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221214111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14513416 + ... + 14514946.

It is an arithmetic number, because the mean of its divisors is an integer number (791706960).

Almost surely, 2^22221211111 is an apocalyptic number.

22221211111 is a deficient number, since it is larger than the sum of its proper divisors (3113411609).

22221211111 is a wasteful number, since it uses less digits than its factorization.

22221211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007.

The product of its digits is 32, while the sum is 16.

Adding to 22221211111 its reverse (11111212222), we get a palindrome (33332423333).

It can be divided in two parts, 22221 and 211111, that added together give a palindrome (233332).

The spelling of 22221211111 in words is "twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".