13216041521 has 4 divisors (see below), whose sum is σ = 13231984500. Its totient is φ = 13200098544.

The previous prime is 13216041497. The next prime is 13216041539. The reversal of 13216041521 is 12514061231.

13216041521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7597039921 + 5619001600 = 87161^2 + 74960^2 .

It is a cyclic number.

It is not a de Polignac number, because 13216041521 - 2¹⁸ = 13215779377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13216041821) 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 3 ways as a sum of consecutive naturals, for example, 7970246 + ... + 7971903.

It is an arithmetic number, because the mean of its divisors is an integer number (3307996125).

Almost surely, 2^13216041521 is an apocalyptic number.

It is an amenable number.

13216041521 is a deficient number, since it is larger than the sum of its proper divisors (15942979).

13216041521 is an equidigital number, since it uses as much as digits as its factorization.

13216041521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15942978.

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 13216041521 in words is "thirteen billion, two hundred sixteen million, forty-one thousand, five hundred twenty-one".