12227815909 has 2 divisors, whose sum is σ = 12227815910. Its totient is φ = 12227815908.

The previous prime is 12227815861. The next prime is 12227815927. The reversal of 12227815909 is 90951872221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12208040100 + 19775809 = 110490^2 + 4447^2 .

It is a cyclic number.

It is not a de Polignac number, because 12227815909 - 2⁷ = 12227815781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12227815309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6113907954 + 6113907955.

It is an arithmetic number, because the mean of its divisors is an integer number (6113907955).

Almost surely, 2^12227815909 is an apocalyptic number.

It is an amenable number.

12227815909 is a deficient number, since it is larger than the sum of its proper divisors (1).

12227815909 is an equidigital number, since it uses as much as digits as its factorization.

12227815909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 12227815909 in words is "twelve billion, two hundred twenty-seven million, eight hundred fifteen thousand, nine hundred nine".