123115115203 has 4 divisors (see below), whose sum is σ = 124598429928. Its totient is φ = 121631800480.

The previous prime is 123115115191. The next prime is 123115115219. The reversal of 123115115203 is 302511511321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302511511321 = 269 ⋅1124578109.

It is a cyclic number.

It is not a de Polignac number, because 123115115203 - 2²⁹ = 122578244291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123115110203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741657238 + ... + 741657403.

It is an arithmetic number, because the mean of its divisors is an integer number (31149607482).

Almost surely, 2^123115115203 is an apocalyptic number.

123115115203 is a deficient number, since it is larger than the sum of its proper divisors (1483314725).

123115115203 is an equidigital number, since it uses as much as digits as its factorization.

123115115203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483314724.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 123115115203 its reverse (302511511321), we get a palindrome (425626626524).

The spelling of 123115115203 in words is "one hundred twenty-three billion, one hundred fifteen million, one hundred fifteen thousand, two hundred three".