13314666221 has 2 divisors, whose sum is σ = 13314666222. Its totient is φ = 13314666220.

The previous prime is 13314666217. The next prime is 13314666251. The reversal of 13314666221 is 12266641331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8827542025 + 4487124196 = 93955^2 + 66986^2 .

It is a cyclic number.

It is not a de Polignac number, because 13314666221 - 2² = 13314666217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13314666251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6657333110 + 6657333111.

It is an arithmetic number, because the mean of its divisors is an integer number (6657333111).

Almost surely, 2^13314666221 is an apocalyptic number.

It is an amenable number.

13314666221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13314666221 is an equidigital number, since it uses as much as digits as its factorization.

13314666221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The spelling of 13314666221 in words is "thirteen billion, three hundred fourteen million, six hundred sixty-six thousand, two hundred twenty-one".