123115123 has 4 divisors (see below), whose sum is σ = 125201880. Its totient is φ = 121028368.

The previous prime is 123115093. The next prime is 123115127. The reversal of 123115123 is 321511321.

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 123115123 - 2⁹ = 123114611 is a prime.

It is a super-2 number, since 2×123115123² = 30314667022610258, which contains 22 as substring.

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 123115123.

It is not an unprimeable number, because it can be changed into a prime (123115127) 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, 1043290 + ... + 1043407.

It is an arithmetic number, because the mean of its divisors is an integer number (31300470).

Almost surely, 2^123115123 is an apocalyptic number.

123115123 is a deficient number, since it is larger than the sum of its proper divisors (2086757).

123115123 is an equidigital number, since it uses as much as digits as its factorization.

123115123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086756.

The product of its digits is 180, while the sum is 19.

The square root of 123115123 is about 11095.7254382037. The cubic root of 123115123 is about 497.4740917293.

Adding to 123115123 its reverse (321511321), we get a palindrome (444626444).

The spelling of 123115123 in words is "one hundred twenty-three million, one hundred fifteen thousand, one hundred twenty-three".