13333333320221 has 2 divisors, whose sum is σ = 13333333320222. Its totient is φ = 13333333320220.

The previous prime is 13333333320163. The next prime is 13333333320271. The reversal of 13333333320221 is 12202333333331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13003156668121 + 330176652100 = 3605989^2 + 574610^2 .

It is a cyclic number.

It is not a de Polignac number, because 13333333320221 - 2¹⁰ = 13333333319197 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 (13333333320271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6666666660110 + 6666666660111.

It is an arithmetic number, because the mean of its divisors is an integer number (6666666660111).

Almost surely, 2^{13333333320221} is an apocalyptic number.

It is an amenable number.

13333333320221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13333333320221 is an equidigital number, since it uses as much as digits as its factorization.

13333333320221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 32.

Adding to 13333333320221 its reverse (12202333333331), we get a palindrome (25535666653552).

The spelling of 13333333320221 in words is "thirteen trillion, three hundred thirty-three billion, three hundred thirty-three million, three hundred twenty thousand, two hundred twenty-one".