12001112199509 has 2 divisors, whose sum is σ = 12001112199510. Its totient is φ = 12001112199508.

The previous prime is 12001112199499. The next prime is 12001112199529. The reversal of 12001112199509 is 90599121110021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11717579379025 + 283532820484 = 3423095^2 + 532478^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001112199509 - 2²⁰ = 12001111150933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001112199529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000556099754 + 6000556099755.

It is an arithmetic number, because the mean of its divisors is an integer number (6000556099755).

Almost surely, 2^{12001112199509} is an apocalyptic number.

It is an amenable number.

12001112199509 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001112199509 is an equidigital number, since it uses as much as digits as its factorization.

12001112199509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 41.

The spelling of 12001112199509 in words is "twelve trillion, one billion, one hundred twelve million, one hundred ninety-nine thousand, five hundred nine".