12556603099 has 2 divisors, whose sum is σ = 12556603100. Its totient is φ = 12556603098.

The previous prime is 12556602997. The next prime is 12556603109. The reversal of 12556603099 is 99030665521.

It is a strong prime.

It is an emirp because it is prime and its reverse (99030665521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12556603099 - 2⁹ = 12556602587 is a prime.

It is not a weakly prime, because it can be changed into another prime (12556633099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6278301549 + 6278301550.

It is an arithmetic number, because the mean of its divisors is an integer number (6278301550).

Almost surely, 2^12556603099 is an apocalyptic number.

12556603099 is a deficient number, since it is larger than the sum of its proper divisors (1).

12556603099 is an equidigital number, since it uses as much as digits as its factorization.

12556603099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 437400, while the sum is 46.

The spelling of 12556603099 in words is "twelve billion, five hundred fifty-six million, six hundred three thousand, ninety-nine".