13354442205221 has 4 divisors (see below), whose sum is σ = 14381706990252. Its totient is φ = 12327177420192.

The previous prime is 13354442205187. The next prime is 13354442205257. The reversal of 13354442205221 is 12250224445331.

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 8890898661121 + 4463543544100 = 2981761^2 + 2112710^2 .

It is a cyclic number.

It is not a de Polignac number, because 13354442205221 - 2¹⁸ = 13354441943077 is a prime.

It is a super-2 number, since 2×13354442205221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13354442205121) 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, 513632392496 + ... + 513632392521.

It is an arithmetic number, because the mean of its divisors is an integer number (3595426747563).

Almost surely, 2^{13354442205221} is an apocalyptic number.

It is an amenable number.

13354442205221 is a deficient number, since it is larger than the sum of its proper divisors (1027264785031).

13354442205221 is a wasteful number, since it uses less digits than its factorization.

13354442205221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027264785030.

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 13354442205221 in words is "thirteen trillion, three hundred fifty-four billion, four hundred forty-two million, two hundred five thousand, two hundred twenty-one".