111310123 has 4 divisors (see below), whose sum is σ = 113410368. Its totient is φ = 109209880.

The previous prime is 111310117. The next prime is 111310139. The reversal of 111310123 is 321013111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321013111 = 10177 ⋅31543.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111310123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111310153) 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, 1050043 + ... + 1050148.

It is an arithmetic number, because the mean of its divisors is an integer number (28352592).

Almost surely, 2^111310123 is an apocalyptic number.

111310123 is a deficient number, since it is larger than the sum of its proper divisors (2100245).

111310123 is an equidigital number, since it uses as much as digits as its factorization.

111310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100244.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 111310123 is about 10550.3612734351. The cubic root of 111310123 is about 481.0367103866.

Adding to 111310123 its reverse (321013111), we get a palindrome (432323234).

It can be divided in two parts, 1113 and 10123, that added together give a square (11236 = 106²).

The spelling of 111310123 in words is "one hundred eleven million, three hundred ten thousand, one hundred twenty-three".