22121223111 has 24 divisors (see below), whose sum is σ = 34751510976. Its totient is φ = 13478270400.

The previous prime is 22121223101. The next prime is 22121223149. The reversal of 22121223111 is 11132212122.

22121223111 is a `hidden beast` number, since 221 + 212 + 231 + 1 + 1 = 666.

It is not a de Polignac number, because 22121223111 - 2⁵ = 22121223079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121223101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 924175 + ... + 947808.

It is an arithmetic number, because the mean of its divisors is an integer number (1447979624).

Almost surely, 2^22121223111 is an apocalyptic number.

22121223111 is a deficient number, since it is larger than the sum of its proper divisors (12630287865).

22121223111 is a wasteful number, since it uses less digits than its factorization.

22121223111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872103 (or 1872100 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 22121223111 its reverse (11132212122), we get a palindrome (33253435233).

The spelling of 22121223111 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred eleven".