13313330221 has 2 divisors, whose sum is σ = 13313330222. Its totient is φ = 13313330220.

The previous prime is 13313330213. The next prime is 13313330231. The reversal of 13313330221 is 12203331331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6943055625 + 6370274596 = 83325^2 + 79814^2 .

It is a cyclic number.

It is not a de Polignac number, because 13313330221 - 2³ = 13313330213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13313330192 and 13313330201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13313330231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656665110 + 6656665111.

It is an arithmetic number, because the mean of its divisors is an integer number (6656665111).

Almost surely, 2^13313330221 is an apocalyptic number.

It is an amenable number.

13313330221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13313330221 is an equidigital number, since it uses as much as digits as its factorization.

13313330221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 13313330221 its reverse (12203331331), we get a palindrome (25516661552).

The spelling of 13313330221 in words is "thirteen billion, three hundred thirteen million, three hundred thirty thousand, two hundred twenty-one".