22121112111 has 16 divisors (see below), whose sum is σ = 33736466688. Its totient is φ = 12630096000.

The previous prime is 22121112107. The next prime is 22121112119. The reversal of 22121112111 is 11121112122.

It is a happy number.

It is not a de Polignac number, because 22121112111 - 2² = 22121112107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121112119) 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, 413325 + ... + 463766.

It is an arithmetic number, because the mean of its divisors is an integer number (2108529168).

Almost surely, 2^22121112111 is an apocalyptic number.

22121112111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22121112111 is a deficient number, since it is larger than the sum of its proper divisors (11615354577).

22121112111 is a wasteful number, since it uses less digits than its factorization.

22121112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878302.

The product of its digits is 16, while the sum is 15.

Adding to 22121112111 its reverse (11121112122), we get a palindrome (33242224233).

The spelling of 22121112111 in words is "twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, one hundred eleven".