12204987709 has 2 divisors, whose sum is σ = 12204987710. Its totient is φ = 12204987708.

The previous prime is 12204987671. The next prime is 12204987719. The reversal of 12204987709 is 90778940221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9989402809 + 2215584900 = 99947^2 + 47070^2 .

It is a cyclic number.

It is not a de Polignac number, because 12204987709 - 2²³ = 12196599101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12204987719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6102493854 + 6102493855.

It is an arithmetic number, because the mean of its divisors is an integer number (6102493855).

Almost surely, 2^12204987709 is an apocalyptic number.

It is an amenable number.

12204987709 is a deficient number, since it is larger than the sum of its proper divisors (1).

12204987709 is an equidigital number, since it uses as much as digits as its factorization.

12204987709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 12204987709 in words is "twelve billion, two hundred four million, nine hundred eighty-seven thousand, seven hundred nine".