22221111211 has 16 divisors (see below), whose sum is σ = 25198387200. Its totient is φ = 19425698208.

The previous prime is 22221111191. The next prime is 22221111257. The reversal of 22221111211 is 11211112222.

It is a cyclic number.

It is not a de Polignac number, because 22221111211 - 2²⁷ = 22086893483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221111611) 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, 813270 + ... + 840148.

It is an arithmetic number, because the mean of its divisors is an integer number (1574899200).

Almost surely, 2^22221111211 is an apocalyptic number.

22221111211 is a deficient number, since it is larger than the sum of its proper divisors (2977275989).

22221111211 is a wasteful number, since it uses less digits than its factorization.

22221111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30258.

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

Adding to 22221111211 its reverse (11211112222), we get a palindrome (33432223433).

The spelling of 22221111211 in words is "twenty-two billion, two hundred twenty-one million, one hundred eleven thousand, two hundred eleven".