22111100111123 has 4 divisors (see below), whose sum is σ = 22441116530760. Its totient is φ = 21781083691488.

The previous prime is 22111100111069. The next prime is 22111100111129. The reversal of 22111100111123 is 32111100111122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22111100111123 - 2⁸ = 22111100110867 is a prime.

It is a super-2 number, since 2×22111100111123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22111100111129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165008209718 + ... + 165008209851.

It is an arithmetic number, because the mean of its divisors is an integer number (5610279132690).

Almost surely, 2^{22111100111123} is an apocalyptic number.

22111100111123 is a deficient number, since it is larger than the sum of its proper divisors (330016419637).

22111100111123 is an equidigital number, since it uses as much as digits as its factorization.

22111100111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330016419636.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 22111100111123 its reverse (32111100111122), we get a palindrome (54222200222245).

Subtracting 22111100111123 from its reverse (32111100111122), we obtain a palindrome (9999999999999).

The spelling of 22111100111123 in words is "twenty-two trillion, one hundred eleven billion, one hundred million, one hundred eleven thousand, one hundred twenty-three".