111243123 has 12 divisors (see below), whose sum is σ = 161260008. Its totient is φ = 73896480.

The previous prime is 111243113. The next prime is 111243151. The reversal of 111243123 is 321342111.

It is not a de Polignac number, because 111243123 - 2⁵ = 111243091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111243096 and 111243105.

It is not an unprimeable number, because it can be changed into a prime (111243113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19465 + ... + 24522.

It is an arithmetic number, because the mean of its divisors is an integer number (13438334).

Almost surely, 2^111243123 is an apocalyptic number.

111243123 is a deficient number, since it is larger than the sum of its proper divisors (50016885).

111243123 is a wasteful number, since it uses less digits than its factorization.

111243123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44274 (or 44271 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 111243123 is about 10547.1855487613. The cubic root of 111243123 is about 480.9401755060.

Adding to 111243123 its reverse (321342111), we get a palindrome (432585234).

The spelling of 111243123 in words is "one hundred eleven million, two hundred forty-three thousand, one hundred twenty-three".