12525743993221 has 2 divisors, whose sum is σ = 12525743993222. Its totient is φ = 12525743993220.

The previous prime is 12525743993177. The next prime is 12525743993297. The reversal of 12525743993221 is 12239934752521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12401060852196 + 124683141025 = 3521514^2 + 353105^2 .

It is a cyclic number.

It is not a de Polignac number, because 12525743993221 - 2³¹ = 12523596509573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12525743933221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6262871996610 + 6262871996611.

It is an arithmetic number, because the mean of its divisors is an integer number (6262871996611).

Almost surely, 2^{12525743993221} is an apocalyptic number.

It is an amenable number.

12525743993221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12525743993221 is an equidigital number, since it uses as much as digits as its factorization.

12525743993221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800, while the sum is 55.

The spelling of 12525743993221 in words is "twelve trillion, five hundred twenty-five billion, seven hundred forty-three million, nine hundred ninety-three thousand, two hundred twenty-one".