13404410221 has 2 divisors, whose sum is σ = 13404410222. Its totient is φ = 13404410220.

The previous prime is 13404410207. The next prime is 13404410267. The reversal of 13404410221 is 12201440431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11208456900 + 2195953321 = 105870^2 + 46861^2 .

It is a cyclic number.

It is not a de Polignac number, because 13404410221 - 2⁷ = 13404410093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13404410192 and 13404410201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13404410021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702205110 + 6702205111.

It is an arithmetic number, because the mean of its divisors is an integer number (6702205111).

Almost surely, 2^13404410221 is an apocalyptic number.

It is an amenable number.

13404410221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13404410221 is an equidigital number, since it uses as much as digits as its factorization.

13404410221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 13404410221 its reverse (12201440431), we get a palindrome (25605850652).

The spelling of 13404410221 in words is "thirteen billion, four hundred four million, four hundred ten thousand, two hundred twenty-one".