111111011423 has 4 divisors (see below), whose sum is σ = 114942425640. Its totient is φ = 107279597208.

The previous prime is 111111011383. The next prime is 111111011437. The reversal of 111111011423 is 324110111111.

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 111111011423 - 2¹⁶ = 111110945887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111011023) 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, 1915707065 + ... + 1915707122.

It is an arithmetic number, because the mean of its divisors is an integer number (28735606410).

Almost surely, 2^111111011423 is an apocalyptic number.

111111011423 is a deficient number, since it is larger than the sum of its proper divisors (3831414217).

111111011423 is an equidigital number, since it uses as much as digits as its factorization.

111111011423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3831414216.

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

Adding to 111111011423 its reverse (324110111111), we get a palindrome (435221122534).

The spelling of 111111011423 in words is "one hundred eleven billion, one hundred eleven million, eleven thousand, four hundred twenty-three".