12139412045 has 4 divisors (see below), whose sum is σ = 14567294460. Its totient is φ = 9711529632.

The previous prime is 12139412017. The next prime is 12139412063. The reversal of 12139412045 is 54021493121.

12139412045 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: 54021493121 = 16649 ⋅3244729.

It can be written as a sum of positive squares in 2 ways, for example, as 4370399881 + 7769012164 = 66109^2 + 88142^2 .

It is a cyclic number.

It is not a de Polignac number, because 12139412045 - 2²⁴ = 12122634829 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 1213941200 + ... + 1213941209.

It is an arithmetic number, because the mean of its divisors is an integer number (3641823615).

Almost surely, 2^12139412045 is an apocalyptic number.

It is an amenable number.

12139412045 is a deficient number, since it is larger than the sum of its proper divisors (2427882415).

12139412045 is an equidigital number, since it uses as much as digits as its factorization.

12139412045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427882414.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 12139412045 in words is "twelve billion, one hundred thirty-nine million, four hundred twelve thousand, forty-five".