13966226106221 has 2 divisors, whose sum is σ = 13966226106222. Its totient is φ = 13966226106220.

The previous prime is 13966226106139. The next prime is 13966226106241. The reversal of 13966226106221 is 12260162266931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9536299848100 + 4429926258121 = 3088090^2 + 2104739^2 .

It is a cyclic number.

It is not a de Polignac number, because 13966226106221 - 2¹⁰ = 13966226105197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13966226106241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6983113053110 + 6983113053111.

It is an arithmetic number, because the mean of its divisors is an integer number (6983113053111).

Almost surely, 2^{13966226106221} is an apocalyptic number.

It is an amenable number.

13966226106221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13966226106221 is an equidigital number, since it uses as much as digits as its factorization.

13966226106221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 13966226106221 in words is "thirteen trillion, nine hundred sixty-six billion, two hundred twenty-six million, one hundred six thousand, two hundred twenty-one".