12509009999 has 2 divisors, whose sum is σ = 12509010000. Its totient is φ = 12509009998.

The previous prime is 12509009971. The next prime is 12509010047. The reversal of 12509009999 is 99990090521.

12509009999 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 12509009999 - 2⁸ = 12509009743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12509009999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12509029999) 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, 6254504999 + 6254505000.

It is an arithmetic number, because the mean of its divisors is an integer number (6254505000).

Almost surely, 2^12509009999 is an apocalyptic number.

12509009999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12509009999 is an equidigital number, since it uses as much as digits as its factorization.

12509009999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 590490, while the sum is 53.

The spelling of 12509009999 in words is "twelve billion, five hundred nine million, nine thousand, nine hundred ninety-nine".