12420136999 has 16 divisors (see below), whose sum is σ = 13374671200. Its totient is φ = 11498651136.

The previous prime is 12420136991. The next prime is 12420137017. The reversal of 12420136999 is 99963102421.

It is a cyclic number.

It is not a de Polignac number, because 12420136999 - 2³ = 12420136991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420136991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110107 + ... + 192259.

It is an arithmetic number, because the mean of its divisors is an integer number (835916950).

Almost surely, 2^12420136999 is an apocalyptic number.

12420136999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12420136999 is a deficient number, since it is larger than the sum of its proper divisors (954534201).

12420136999 is a wasteful number, since it uses less digits than its factorization.

12420136999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82354.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 12420136999 in words is "twelve billion, four hundred twenty million, one hundred thirty-six thousand, nine hundred ninety-nine".