111323521423 has 4 divisors (see below), whose sum is σ = 111581813088. Its totient is φ = 111065229760.

The previous prime is 111323521411. The next prime is 111323521427. The reversal of 111323521423 is 324125323111.

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 111323521423 - 2⁹ = 111323520911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111323521391 and 111323521400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111323521427) 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, 129145186 + ... + 129146047.

It is an arithmetic number, because the mean of its divisors is an integer number (27895453272).

Almost surely, 2^111323521423 is an apocalyptic number.

111323521423 is a deficient number, since it is larger than the sum of its proper divisors (258291665).

111323521423 is an equidigital number, since it uses as much as digits as its factorization.

111323521423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258291664.

The product of its digits is 4320, while the sum is 28.

Adding to 111323521423 its reverse (324125323111), we get a palindrome (435448844534).

The spelling of 111323521423 in words is "one hundred eleven billion, three hundred twenty-three million, five hundred twenty-one thousand, four hundred twenty-three".