13221121113 has 6 divisors (see below), whose sum is σ = 19097174954. Its totient is φ = 8814080736.

The previous prime is 13221121061. The next prime is 13221121117. The reversal of 13221121113 is 31112112231.

It can be written as a sum of positive squares in only one way, i.e., 7284110409 + 5937010704 = 85347^2 + 77052^2 .

It is not a de Polignac number, because 13221121113 - 2¹² = 13221117017 is a prime.

It is a super-2 number, since 2×13221121113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13221121117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 734506720 + ... + 734506737.

Almost surely, 2^13221121113 is an apocalyptic number.

It is an amenable number.

13221121113 is a deficient number, since it is larger than the sum of its proper divisors (5876053841).

13221121113 is a wasteful number, since it uses less digits than its factorization.

13221121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469013463 (or 1469013460 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 13221121113 its reverse (31112112231), we get a palindrome (44333233344).

The spelling of 13221121113 in words is "thirteen billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred thirteen".