13232201221 has 2 divisors, whose sum is σ = 13232201222. Its totient is φ = 13232201220.

The previous prime is 13232201173. The next prime is 13232201237. The reversal of 13232201221 is 12210223231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7074660321 + 6157540900 = 84111^2 + 78470^2 .

It is an emirp because it is prime and its reverse (12210223231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13232201221 is a prime.

It is a super-2 number, since 2×13232201221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13232201261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6616100610 + 6616100611.

It is an arithmetic number, because the mean of its divisors is an integer number (6616100611).

Almost surely, 2^13232201221 is an apocalyptic number.

It is an amenable number.

13232201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13232201221 is an equidigital number, since it uses as much as digits as its factorization.

13232201221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13232201221 its reverse (12210223231), we get a palindrome (25442424452).

The spelling of 13232201221 in words is "thirteen billion, two hundred thirty-two million, two hundred one thousand, two hundred twenty-one".