22111211211123 has 16 divisors (see below), whose sum is σ = 29520547233696. Its totient is φ = 14721342359040.

The previous prime is 22111211211083. The next prime is 22111211211137. The reversal of 22111211211123 is 32111211211122.

It is not a de Polignac number, because 22111211211123 - 2¹⁶ = 22111211145587 is a prime.

It is a super-2 number, since 2×22111211211123² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22111211211123.

It is not an unprimeable number, because it can be changed into a prime (22111211211923) 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, 104706363 + ... + 104917323.

It is an arithmetic number, because the mean of its divisors is an integer number (1845034202106).

Almost surely, 2^{22111211211123} is an apocalyptic number.

22111211211123 is a deficient number, since it is larger than the sum of its proper divisors (7409336022573).

22111211211123 is a wasteful number, since it uses less digits than its factorization.

22111211211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256934.

The product of its digits is 96, while the sum is 21.

Adding to 22111211211123 its reverse (32111211211122), we get a palindrome (54222422422245).

Subtracting 22111211211123 from its reverse (32111211211122), we obtain a palindrome (9999999999999).

The spelling of 22111211211123 in words is "twenty-two trillion, one hundred eleven billion, two hundred eleven million, two hundred eleven thousand, one hundred twenty-three".