12708448721 has 2 divisors, whose sum is σ = 12708448722. Its totient is φ = 12708448720.

The previous prime is 12708448633. The next prime is 12708448741. The reversal of 12708448721 is 12784480721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11443650625 + 1264798096 = 106975^2 + 35564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12708448721 - 2¹⁴ = 12708432337 is a prime.

It is not a weakly prime, because it can be changed into another prime (12708448741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6354224360 + 6354224361.

It is an arithmetic number, because the mean of its divisors is an integer number (6354224361).

Almost surely, 2^12708448721 is an apocalyptic number.

It is an amenable number.

12708448721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12708448721 is an equidigital number, since it uses as much as digits as its factorization.

12708448721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200704, while the sum is 44.

The spelling of 12708448721 in words is "twelve billion, seven hundred eight million, four hundred forty-eight thousand, seven hundred twenty-one".