13011302221 has 2 divisors, whose sum is σ = 13011302222. Its totient is φ = 13011302220.

The previous prime is 13011302179. The next prime is 13011302251. The reversal of 13011302221 is 12220311031.

13011302221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12362326596 + 648975625 = 111186^2 + 25475^2 .

It is a cyclic number.

It is not a de Polignac number, because 13011302221 - 2⁷ = 13011302093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13011302195 and 13011302204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13011302251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6505651110 + 6505651111.

It is an arithmetic number, because the mean of its divisors is an integer number (6505651111).

Almost surely, 2^13011302221 is an apocalyptic number.

It is an amenable number.

13011302221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13011302221 is an equidigital number, since it uses as much as digits as its factorization.

13011302221 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 13011302221 its reverse (12220311031), we get a palindrome (25231613252).

The spelling of 13011302221 in words is "thirteen billion, eleven million, three hundred two thousand, two hundred twenty-one".