111223134423 has 16 divisors (see below), whose sum is σ = 174467662560. Its totient is φ = 69787064448.

The previous prime is 111223134391. The next prime is 111223134433. The reversal of 111223134423 is 324431322111.

111223134423 is a `hidden beast` number, since 1 + 1 + 1 + 2 + 231 + 3 + 4 + 423 = 666.

It is not a de Polignac number, because 111223134423 - 2⁵ = 111223134391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111223134433) 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, 121157640 + ... + 121158557.

It is an arithmetic number, because the mean of its divisors is an integer number (10904228910).

Almost surely, 2^111223134423 is an apocalyptic number.

111223134423 is a deficient number, since it is larger than the sum of its proper divisors (63244528137).

111223134423 is a wasteful number, since it uses less digits than its factorization.

111223134423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242316223 (or 242316217 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 111223134423 its reverse (324431322111), we get a palindrome (435654456534).

The spelling of 111223134423 in words is "one hundred eleven billion, two hundred twenty-three million, one hundred thirty-four thousand, four hundred twenty-three".