22111555123 has 12 divisors (see below), whose sum is σ = 25791712032. Its totient is φ = 18901103760.

The previous prime is 22111555069. The next prime is 22111555177. The reversal of 22111555123 is 32155511122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22111555069) and next prime (22111555177).

It is not a de Polignac number, because 22111555123 - 2²⁹ = 21574684211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111555091 and 22111555100.

It is not an unprimeable number, because it can be changed into a prime (22111555723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 596808 + ... + 632773.

It is an arithmetic number, because the mean of its divisors is an integer number (2149309336).

Almost surely, 2^22111555123 is an apocalyptic number.

22111555123 is a deficient number, since it is larger than the sum of its proper divisors (3680156909).

22111555123 is a wasteful number, since it uses less digits than its factorization.

22111555123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229962 (or 1229955 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

The spelling of 22111555123 in words is "twenty-two billion, one hundred eleven million, five hundred fifty-five thousand, one hundred twenty-three".