111123310123 has 4 divisors (see below), whose sum is σ = 126998068720. Its totient is φ = 95248551528.

The previous prime is 111123310097. The next prime is 111123310139. The reversal of 111123310123 is 321013321111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111123310123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111123310123.

It is not an unprimeable number, because it can be changed into a prime (111123310523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7937379288 + ... + 7937379301.

It is an arithmetic number, because the mean of its divisors is an integer number (31749517180).

Almost surely, 2^111123310123 is an apocalyptic number.

111123310123 is a deficient number, since it is larger than the sum of its proper divisors (15874758597).

111123310123 is an equidigital number, since it uses as much as digits as its factorization.

111123310123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15874758596.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 111123310123 its reverse (321013321111), we get a palindrome (432136631234).

The spelling of 111123310123 in words is "one hundred eleven billion, one hundred twenty-three million, three hundred ten thousand, one hundred twenty-three".