12012009112109 has 2 divisors, whose sum is σ = 12012009112110. Its totient is φ = 12012009112108.

The previous prime is 12012009112093. The next prime is 12012009112111. The reversal of 12012009112109 is 90121190021021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10987567562500 + 1024441549609 = 3314750^2 + 1012147^2 .

It is an emirp because it is prime and its reverse (90121190021021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12012009112109 - 2⁴ = 12012009112093 is a prime.

Together with 12012009112111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012009112199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006004556054 + 6006004556055.

It is an arithmetic number, because the mean of its divisors is an integer number (6006004556055).

Almost surely, 2^{12012009112109} is an apocalyptic number.

It is an amenable number.

12012009112109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012009112109 is an equidigital number, since it uses as much as digits as its factorization.

12012009112109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 12012009112109 in words is "twelve trillion, twelve billion, nine million, one hundred twelve thousand, one hundred nine".