13361021 has 2 divisors, whose sum is σ = 13361022. Its totient is φ = 13361020.

The previous prime is 13361011. The next prime is 13361027. The reversal of 13361021 is 12016331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6832996 + 6528025 = 2614^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 13361021 - 2¹⁴ = 13344637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13361027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6680510 + 6680511.

It is an arithmetic number, because the mean of its divisors is an integer number (6680511).

Almost surely, 2^13361021 is an apocalyptic number.

It is an amenable number.

13361021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13361021 is an equidigital number, since it uses as much as digits as its factorization.

13361021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 13361021 is about 3655.2730404171. The cubic root of 13361021 is about 237.2902436097.

Adding to 13361021 its reverse (12016331), we get a palindrome (25377352).

The spelling of 13361021 in words is "thirteen million, three hundred sixty-one thousand, twenty-one".