13230401221 has 2 divisors, whose sum is σ = 13230401222. Its totient is φ = 13230401220.

The previous prime is 13230401189. The next prime is 13230401231. The reversal of 13230401221 is 12210403231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13227300100 + 3101121 = 115010^2 + 1761^2 .

It is a cyclic number.

It is not a de Polignac number, because 13230401221 - 2⁵ = 13230401189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13230401231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615200610 + 6615200611.

It is an arithmetic number, because the mean of its divisors is an integer number (6615200611).

Almost surely, 2^13230401221 is an apocalyptic number.

It is an amenable number.

13230401221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13230401221 is an equidigital number, since it uses as much as digits as its factorization.

13230401221 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 13230401221 its reverse (12210403231), we get a palindrome (25440804452).

The spelling of 13230401221 in words is "thirteen billion, two hundred thirty million, four hundred one thousand, two hundred twenty-one".