12445042123 has 4 divisors (see below), whose sum is σ = 13100044360. Its totient is φ = 11790039888.

The previous prime is 12445042111. The next prime is 12445042153. The reversal of 12445042123 is 32124054421.

12445042123 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, and also an emirpimes, since its reverse is a distinct semiprime: 32124054421 = 20201 ⋅1590221.

It is a cyclic number.

It is not a de Polignac number, because 12445042123 - 2⁹ = 12445041611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12445042091 and 12445042100.

It is not an unprimeable number, because it can be changed into a prime (12445042153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327501090 + ... + 327501127.

It is an arithmetic number, because the mean of its divisors is an integer number (3275011090).

Almost surely, 2^12445042123 is an apocalyptic number.

12445042123 is a deficient number, since it is larger than the sum of its proper divisors (655002237).

12445042123 is an equidigital number, since it uses as much as digits as its factorization.

12445042123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655002236.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 12445042123 its reverse (32124054421), we get a palindrome (44569096544).

The spelling of 12445042123 in words is "twelve billion, four hundred forty-five million, forty-two thousand, one hundred twenty-three".