12008128409 has 2 divisors, whose sum is σ = 12008128410. Its totient is φ = 12008128408.

The previous prime is 12008128373. The next prime is 12008128417. The reversal of 12008128409 is 90482180021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11936218009 + 71910400 = 109253^2 + 8480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12008128409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12008128439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6004064204 + 6004064205.

It is an arithmetic number, because the mean of its divisors is an integer number (6004064205).

Almost surely, 2^12008128409 is an apocalyptic number.

It is an amenable number.

12008128409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12008128409 is an equidigital number, since it uses as much as digits as its factorization.

12008128409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 12008128409 in words is "twelve billion, eight million, one hundred twenty-eight thousand, four hundred nine".