22221222111 has 24 divisors (see below), whose sum is σ = 35342521344. Its totient is φ = 13341537360.

The previous prime is 22221222109. The next prime is 22221222113. The reversal of 22221222111 is 11122212222.

It is a happy number.

22221222111 is a `hidden beast` number, since 222 + 212 + 221 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (22221222109) and next prime (22221222113).

It is not a de Polignac number, because 22221222111 - 2¹ = 22221222109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221222113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1038271 + ... + 1059456.

It is an arithmetic number, because the mean of its divisors is an integer number (1472605056).

Almost surely, 2^22221222111 is an apocalyptic number.

22221222111 is a deficient number, since it is larger than the sum of its proper divisors (13121299233).

22221222111 is a wasteful number, since it uses less digits than its factorization.

22221222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097851 (or 2097848 counting only the distinct ones).

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

Adding to 22221222111 its reverse (11122212222), we get a palindrome (33343434333).

The spelling of 22221222111 in words is "twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".