13320020221 has 2 divisors, whose sum is σ = 13320020222. Its totient is φ = 13320020220.

The previous prime is 13320020191. The next prime is 13320020227. The reversal of 13320020221 is 12202002331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10583265625 + 2736754596 = 102875^2 + 52314^2 .

It is a cyclic number.

It is not a de Polignac number, because 13320020221 - 2¹³ = 13320012029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13320020195 and 13320020204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13320020227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660010110 + 6660010111.

It is an arithmetic number, because the mean of its divisors is an integer number (6660010111).

Almost surely, 2^13320020221 is an apocalyptic number.

It is an amenable number.

13320020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13320020221 is an equidigital number, since it uses as much as digits as its factorization.

13320020221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 13320020221 its reverse (12202002331), we get a palindrome (25522022552).

The spelling of 13320020221 in words is "thirteen billion, three hundred twenty million, twenty thousand, two hundred twenty-one".