12221362709 has 2 divisors, whose sum is σ = 12221362710. Its totient is φ = 12221362708.

The previous prime is 12221362667. The next prime is 12221362757. The reversal of 12221362709 is 90726312221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8653092484 + 3568270225 = 93022^2 + 59735^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221362709 - 2⁸ = 12221362453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221352709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110681354 + 6110681355.

It is an arithmetic number, because the mean of its divisors is an integer number (6110681355).

Almost surely, 2^12221362709 is an apocalyptic number.

It is an amenable number.

12221362709 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221362709 is an equidigital number, since it uses as much as digits as its factorization.

12221362709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 12221362709 in words is "twelve billion, two hundred twenty-one million, three hundred sixty-two thousand, seven hundred nine".