22222221111 has 12 divisors (see below), whose sum is σ = 32429680192. Its totient is φ = 14662083456.

The previous prime is 22222221083. The next prime is 22222221139. The reversal of 22222221111 is 11112222222.

It is a happy number.

22222221111 is a `hidden beast` number, since 222 + 222 + 211 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (22222221083) and next prime (22222221139).

It is not a de Polignac number, because 22222221111 - 2¹⁰ = 22222220087 is a prime.

It is a super-2 number, since 2×22222221111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222222111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12726631 + ... + 12728376.

Almost surely, 2^22222221111 is an apocalyptic number.

22222221111 is a deficient number, since it is larger than the sum of its proper divisors (10207459081).

22222221111 is a wasteful number, since it uses less digits than its factorization.

22222221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25455110 (or 25455107 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 22222221111 its reverse (11112222222), we get a palindrome (33334443333).

It can be divided in two parts, 222222211 and 11, that added together give a palindrome (222222222).

The spelling of 22222221111 in words is "twenty-two billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred eleven".