13166053321 has 2 divisors, whose sum is σ = 13166053322. Its totient is φ = 13166053320.

The previous prime is 13166053319. The next prime is 13166053339. The reversal of 13166053321 is 12335066131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9921156025 + 3244897296 = 99605^2 + 56964^2 .

It is a cyclic number.

It is not a de Polignac number, because 13166053321 - 2¹ = 13166053319 is a prime.

Together with 13166053319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13166053361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6583026660 + 6583026661.

It is an arithmetic number, because the mean of its divisors is an integer number (6583026661).

Almost surely, 2^13166053321 is an apocalyptic number.

It is an amenable number.

13166053321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13166053321 is an equidigital number, since it uses as much as digits as its factorization.

13166053321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The spelling of 13166053321 in words is "thirteen billion, one hundred sixty-six million, fifty-three thousand, three hundred twenty-one".