12501421399 has 2 divisors, whose sum is σ = 12501421400. Its totient is φ = 12501421398.

The previous prime is 12501421343. The next prime is 12501421501. The reversal of 12501421399 is 99312410521.

12501421399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12501421399 - 2¹¹ = 12501419351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12501421099) 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 as a sum of consecutive naturals, namely, 6250710699 + 6250710700.

It is an arithmetic number, because the mean of its divisors is an integer number (6250710700).

Almost surely, 2^12501421399 is an apocalyptic number.

12501421399 is a deficient number, since it is larger than the sum of its proper divisors (1).

12501421399 is an equidigital number, since it uses as much as digits as its factorization.

12501421399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 12501421399 in words is "twelve billion, five hundred one million, four hundred twenty-one thousand, three hundred ninety-nine".