13055066221 has 2 divisors, whose sum is σ = 13055066222. Its totient is φ = 13055066220.

The previous prime is 13055066203. The next prime is 13055066333. The reversal of 13055066221 is 12266055031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13006262025 + 48804196 = 114045^2 + 6986^2 .

It is a cyclic number.

It is not a de Polignac number, because 13055066221 - 2¹⁹ = 13054541933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13055066621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6527533110 + 6527533111.

It is an arithmetic number, because the mean of its divisors is an integer number (6527533111).

Almost surely, 2^13055066221 is an apocalyptic number.

It is an amenable number.

13055066221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13055066221 is an equidigital number, since it uses as much as digits as its factorization.

13055066221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 13055066221 in words is "thirteen billion, fifty-five million, sixty-six thousand, two hundred twenty-one".