13216221402321 has 48 divisors (see below), whose sum is σ = 20749888350720. Its totient is φ = 7459728756480.

The previous prime is 13216221402283. The next prime is 13216221402331. The reversal of 13216221402321 is 12320412261231.

It is a happy number.

It is not a de Polignac number, because 13216221402321 - 2¹⁵ = 13216221369553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13216221402331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12455575 + ... + 13474931.

It is an arithmetic number, because the mean of its divisors is an integer number (432289340640).

Almost surely, 2^{13216221402321} is an apocalyptic number.

It is an amenable number.

13216221402321 is a deficient number, since it is larger than the sum of its proper divisors (7533666948399).

13216221402321 is a wasteful number, since it uses less digits than its factorization.

13216221402321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020454 (or 1020447 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 13216221402321 its reverse (12320412261231), we get a palindrome (25536633663552).

The spelling of 13216221402321 in words is "thirteen trillion, two hundred sixteen billion, two hundred twenty-one million, four hundred two thousand, three hundred twenty-one".