22155555123 has 12 divisors (see below), whose sum is σ = 34464197040. Its totient is φ = 13634187696.

The previous prime is 22155555101. The next prime is 22155555157. The reversal of 22155555123 is 32155555122.

22155555123 is a `hidden beast` number, since 22 + 15 + 55 + 551 + 23 = 666.

It is not a de Polignac number, because 22155555123 - 2²⁹ = 21618684211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22155555623) 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, 94681743 + ... + 94681976.

It is an arithmetic number, because the mean of its divisors is an integer number (2872016420).

Almost surely, 2^22155555123 is an apocalyptic number.

22155555123 is a deficient number, since it is larger than the sum of its proper divisors (12308641917).

22155555123 is a wasteful number, since it uses less digits than its factorization.

22155555123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189363738 (or 189363735 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

Subtracting 22155555123 from its reverse (32155555122), we obtain a palindrome (9999999999).

The spelling of 22155555123 in words is "twenty-two billion, one hundred fifty-five million, five hundred fifty-five thousand, one hundred twenty-three".