13321010221 has 2 divisors, whose sum is σ = 13321010222. Its totient is φ = 13321010220.

The previous prime is 13321010189. The next prime is 13321010239. The reversal of 13321010221 is 12201012331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10555302121 + 2765708100 = 102739^2 + 52590^2 .

It is a cyclic number.

It is not a de Polignac number, because 13321010221 - 2⁵ = 13321010189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13321010195 and 13321010204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13321010621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660505110 + 6660505111.

It is an arithmetic number, because the mean of its divisors is an integer number (6660505111).

Almost surely, 2^13321010221 is an apocalyptic number.

It is an amenable number.

13321010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13321010221 is an equidigital number, since it uses as much as digits as its factorization.

13321010221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13321010221 its reverse (12201012331), we get a palindrome (25522022552).

The spelling of 13321010221 in words is "thirteen billion, three hundred twenty-one million, ten thousand, two hundred twenty-one".