13301221 has 2 divisors, whose sum is σ = 13301222. Its totient is φ = 13301220.

The previous prime is 13301219. The next prime is 13301269. The reversal of 13301221 is 12210331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10150596 + 3150625 = 3186^2 + 1775^2 .

It is a cyclic number.

It is not a de Polignac number, because 13301221 - 2¹ = 13301219 is a prime.

Together with 13301219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13301621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6650610 + 6650611.

It is an arithmetic number, because the mean of its divisors is an integer number (6650611).

Almost surely, 2^13301221 is an apocalyptic number.

It is an amenable number.

13301221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13301221 is an equidigital number, since it uses as much as digits as its factorization.

13301221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 13301221 is about 3647.0839036140. The cubic root of 13301221 is about 236.9357003607.

Adding to 13301221 its reverse (12210331), we get a palindrome (25511552).

The spelling of 13301221 in words is "thirteen million, three hundred one thousand, two hundred twenty-one".