13819573967221 has 24 divisors (see below), whose sum is σ = 15231257109152. Its totient is φ = 12529229882400.

The previous prime is 13819573967183. The next prime is 13819573967261. The reversal of 13819573967221 is 12276937591831.

13819573967221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13819573967221 - 2¹⁹ = 13819573442933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13819573967261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284498866 + ... + 284547436.

Almost surely, 2^{13819573967221} is an apocalyptic number.

13819573967221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13819573967221 is a deficient number, since it is larger than the sum of its proper divisors (1411683141931).

13819573967221 is a wasteful number, since it uses less digits than its factorization.

13819573967221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54913 (or 54902 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 64.

The spelling of 13819573967221 in words is "thirteen trillion, eight hundred nineteen billion, five hundred seventy-three million, nine hundred sixty-seven thousand, two hundred twenty-one".