12221039009 has 2 divisors, whose sum is σ = 12221039010. Its totient is φ = 12221039008.

The previous prime is 12221039003. The next prime is 12221039053. The reversal of 12221039009 is 90093012221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11771599009 + 449440000 = 108497^2 + 21200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221039009 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 (12221039003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110519504 + 6110519505.

It is an arithmetic number, because the mean of its divisors is an integer number (6110519505).

Almost surely, 2^12221039009 is an apocalyptic number.

It is an amenable number.

12221039009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221039009 is an equidigital number, since it uses as much as digits as its factorization.

12221039009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 12221039009 in words is "twelve billion, two hundred twenty-one million, thirty-nine thousand, nine".