12221000009 has 4 divisors (see below), whose sum is σ = 12221283204. Its totient is φ = 12220716816.

The previous prime is 12221000003. The next prime is 12221000039. The reversal of 12221000009 is 90000012221.

12221000009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6264247609 + 5956752400 = 79147^2 + 77180^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221000009 - 2³² = 7926032713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61922 + ... + 168155.

It is an arithmetic number, because the mean of its divisors is an integer number (3055320801).

Almost surely, 2^12221000009 is an apocalyptic number.

It is an amenable number.

12221000009 is a deficient number, since it is larger than the sum of its proper divisors (283195).

12221000009 is an equidigital number, since it uses as much as digits as its factorization.

12221000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283194.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 12221000009 in words is "twelve billion, two hundred twenty-one million, nine", and thus it is an aban number.