12344380721 has 2 divisors, whose sum is σ = 12344380722. Its totient is φ = 12344380720.

The previous prime is 12344380661. The next prime is 12344380733. The reversal of 12344380721 is 12708344321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9848379121 + 2496001600 = 99239^2 + 49960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12344380721 is a prime.

It is not a weakly prime, because it can be changed into another prime (12344380421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172190360 + 6172190361.

It is an arithmetic number, because the mean of its divisors is an integer number (6172190361).

Almost surely, 2^12344380721 is an apocalyptic number.

It is an amenable number.

12344380721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12344380721 is an equidigital number, since it uses as much as digits as its factorization.

12344380721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 12344380721 in words is "twelve billion, three hundred forty-four million, three hundred eighty thousand, seven hundred twenty-one".