13220304121 has 2 divisors, whose sum is σ = 13220304122. Its totient is φ = 13220304120.

The previous prime is 13220304103. The next prime is 13220304137. The reversal of 13220304121 is 12140302231.

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., 10991425600 + 2228878521 = 104840^2 + 47211^2 .

It is an emirp because it is prime and its reverse (12140302231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13220304121 - 2⁵ = 13220304089 is a prime.

It is not a weakly prime, because it can be changed into another prime (13220304221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610152060 + 6610152061.

It is an arithmetic number, because the mean of its divisors is an integer number (6610152061).

Almost surely, 2^13220304121 is an apocalyptic number.

It is an amenable number.

13220304121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220304121 is an equidigital number, since it uses as much as digits as its factorization.

13220304121 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 13220304121 its reverse (12140302231), we get a palindrome (25360606352).

The spelling of 13220304121 in words is "thirteen billion, two hundred twenty million, three hundred four thousand, one hundred twenty-one".