13662212325221 has 2 divisors, whose sum is σ = 13662212325222. Its totient is φ = 13662212325220.

The previous prime is 13662212325199. The next prime is 13662212325283. The reversal of 13662212325221 is 12252321226631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13399340781121 + 262871544100 = 3660511^2 + 512710^2 .

It is a cyclic number.

It is not a de Polignac number, because 13662212325221 - 2¹⁸ = 13662212063077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13662212324221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6831106162610 + 6831106162611.

It is an arithmetic number, because the mean of its divisors is an integer number (6831106162611).

Almost surely, 2^{13662212325221} is an apocalyptic number.

It is an amenable number.

13662212325221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13662212325221 is an equidigital number, since it uses as much as digits as its factorization.

13662212325221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

The spelling of 13662212325221 in words is "thirteen trillion, six hundred sixty-two billion, two hundred twelve million, three hundred twenty-five thousand, two hundred twenty-one".