13454664221 has 2 divisors, whose sum is σ = 13454664222. Its totient is φ = 13454664220.

The previous prime is 13454664211. The next prime is 13454664233. The reversal of 13454664221 is 12246645431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12704671225 + 749992996 = 112715^2 + 27386^2 .

It is a cyclic number.

It is not a de Polignac number, because 13454664221 - 2¹⁸ = 13454402077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13454664211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6727332110 + 6727332111.

It is an arithmetic number, because the mean of its divisors is an integer number (6727332111).

Almost surely, 2^13454664221 is an apocalyptic number.

It is an amenable number.

13454664221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13454664221 is an equidigital number, since it uses as much as digits as its factorization.

13454664221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 38.

The spelling of 13454664221 in words is "thirteen billion, four hundred fifty-four million, six hundred sixty-four thousand, two hundred twenty-one".