13216477321 has 2 divisors, whose sum is σ = 13216477322. Its totient is φ = 13216477320.

The previous prime is 13216477303. The next prime is 13216477333. The reversal of 13216477321 is 12377461231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11057574025 + 2158903296 = 105155^2 + 46464^2 .

It is an emirp because it is prime and its reverse (12377461231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13216477321 - 2⁷ = 13216477193 is a prime.

It is not a weakly prime, because it can be changed into another prime (13216477621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6608238660 + 6608238661.

It is an arithmetic number, because the mean of its divisors is an integer number (6608238661).

Almost surely, 2^13216477321 is an apocalyptic number.

It is an amenable number.

13216477321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13216477321 is an equidigital number, since it uses as much as digits as its factorization.

13216477321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The spelling of 13216477321 in words is "thirteen billion, two hundred sixteen million, four hundred seventy-seven thousand, three hundred twenty-one".