12103123112123 has 4 divisors (see below), whose sum is σ = 12115639269360. Its totient is φ = 12090606954888.

The previous prime is 12103123112089. The next prime is 12103123112189. The reversal of 12103123112123 is 32121132130121.

It is a happy number.

12103123112123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12103123112123 - 2¹⁰ = 12103123111099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12103123117123) 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, 6258077168 + ... + 6258079101.

It is an arithmetic number, because the mean of its divisors is an integer number (3028909817340).

Almost surely, 2^{12103123112123} is an apocalyptic number.

12103123112123 is a deficient number, since it is larger than the sum of its proper divisors (12516157237).

12103123112123 is an equidigital number, since it uses as much as digits as its factorization.

12103123112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12516157236.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 12103123112123 its reverse (32121132130121), we get a palindrome (44224255242244).

The spelling of 12103123112123 in words is "twelve trillion, one hundred three billion, one hundred twenty-three million, one hundred twelve thousand, one hundred twenty-three".