12099917321 has 2 divisors, whose sum is σ = 12099917322. Its totient is φ = 12099917320.

The previous prime is 12099917317. The next prime is 12099917339. The reversal of 12099917321 is 12371999021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6199987600 + 5899929721 = 78740^2 + 76811^2 .

It is a cyclic number.

It is not a de Polignac number, because 12099917321 - 2² = 12099917317 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 (12099917521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6049958660 + 6049958661.

It is an arithmetic number, because the mean of its divisors is an integer number (6049958661).

Almost surely, 2^12099917321 is an apocalyptic number.

It is an amenable number.

12099917321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12099917321 is an equidigital number, since it uses as much as digits as its factorization.

12099917321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 12099917321 in words is "twelve billion, ninety-nine million, nine hundred seventeen thousand, three hundred twenty-one".