13321112643 has 6 divisors (see below), whose sum is σ = 19241607164. Its totient is φ = 8880741756.

The previous prime is 13321112633. The next prime is 13321112657. The reversal of 13321112643 is 34621112331.

It is a happy number.

13321112643 is a `hidden beast` number, since 1 + 3 + 3 + 2 + 1 + 1 + 12 + 643 = 666.

It is not a de Polignac number, because 13321112643 - 2¹³ = 13321104451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13321112633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 740061805 + ... + 740061822.

Almost surely, 2^13321112643 is an apocalyptic number.

13321112643 is a deficient number, since it is larger than the sum of its proper divisors (5920494521).

13321112643 is a wasteful number, since it uses less digits than its factorization.

13321112643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480123633 (or 1480123630 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 13321112643 its reverse (34621112331), we get a palindrome (47942224974).

The spelling of 13321112643 in words is "thirteen billion, three hundred twenty-one million, one hundred twelve thousand, six hundred forty-three".