12102101009 has 2 divisors, whose sum is σ = 12102101010. Its totient is φ = 12102101008.

The previous prime is 12102100999. The next prime is 12102101021. The reversal of 12102101009 is 90010120121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12051648400 + 50452609 = 109780^2 + 7103^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102101009 - 2²⁴ = 12085323793 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 (12102101069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051050504 + 6051050505.

It is an arithmetic number, because the mean of its divisors is an integer number (6051050505).

Almost surely, 2^12102101009 is an apocalyptic number.

It is an amenable number.

12102101009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102101009 is an equidigital number, since it uses as much as digits as its factorization.

12102101009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 12102101009 in words is "twelve billion, one hundred two million, one hundred one thousand, nine".