12561544301 has 2 divisors, whose sum is σ = 12561544302. Its totient is φ = 12561544300.

The previous prime is 12561544297. The next prime is 12561544337. The reversal of 12561544301 is 10344516521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7612562500 + 4948981801 = 87250^2 + 70349^2 .

It is a cyclic number.

It is not a de Polignac number, because 12561544301 - 2² = 12561544297 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12561544201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6280772150 + 6280772151.

It is an arithmetic number, because the mean of its divisors is an integer number (6280772151).

Almost surely, 2^12561544301 is an apocalyptic number.

It is an amenable number.

12561544301 is a deficient number, since it is larger than the sum of its proper divisors (1).

12561544301 is an equidigital number, since it uses as much as digits as its factorization.

12561544301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 12561544301 in words is "twelve billion, five hundred sixty-one million, five hundred forty-four thousand, three hundred one".