12128844719 has 2 divisors, whose sum is σ = 12128844720. Its totient is φ = 12128844718.

The previous prime is 12128844691. The next prime is 12128844757. The reversal of 12128844719 is 91744882121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12128844719 is a prime.

It is a super-2 number, since 2×12128844719² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12128844779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064422359 + 6064422360.

It is an arithmetic number, because the mean of its divisors is an integer number (6064422360).

Almost surely, 2^12128844719 is an apocalyptic number.

12128844719 is a deficient number, since it is larger than the sum of its proper divisors (1).

12128844719 is an equidigital number, since it uses as much as digits as its factorization.

12128844719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 47.

The spelling of 12128844719 in words is "twelve billion, one hundred twenty-eight million, eight hundred forty-four thousand, seven hundred nineteen".