12244175621 has 2 divisors, whose sum is σ = 12244175622. Its totient is φ = 12244175620.

The previous prime is 12244175597. The next prime is 12244175711. The reversal of 12244175621 is 12657144221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6310554721 + 5933620900 = 79439^2 + 77030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12244175621 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12244175221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6122087810 + 6122087811.

It is an arithmetic number, because the mean of its divisors is an integer number (6122087811).

Almost surely, 2^12244175621 is an apocalyptic number.

It is an amenable number.

12244175621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12244175621 is an equidigital number, since it uses as much as digits as its factorization.

12244175621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 35.

The spelling of 12244175621 in words is "twelve billion, two hundred forty-four million, one hundred seventy-five thousand, six hundred twenty-one".