12104957512721 has 2 divisors, whose sum is σ = 12104957512722. Its totient is φ = 12104957512720.

The previous prime is 12104957512699. The next prime is 12104957512727. The reversal of 12104957512721 is 12721575940121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11899988532496 + 204968980225 = 3449636^2 + 452735^2 .

It is a cyclic number.

It is not a de Polignac number, because 12104957512721 - 2¹⁸ = 12104957250577 is a prime.

It is not a weakly prime, because it can be changed into another prime (12104957512727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6052478756360 + 6052478756361.

It is an arithmetic number, because the mean of its divisors is an integer number (6052478756361).

Almost surely, 2^{12104957512721} is an apocalyptic number.

It is an amenable number.

12104957512721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12104957512721 is an equidigital number, since it uses as much as digits as its factorization.

12104957512721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 47.

The spelling of 12104957512721 in words is "twelve trillion, one hundred four billion, nine hundred fifty-seven million, five hundred twelve thousand, seven hundred twenty-one".