13221366743 has 16 divisors (see below), whose sum is σ = 14446688256. Its totient is φ = 12025987680.

The previous prime is 13221366727. The next prime is 13221366779. The reversal of 13221366743 is 34766312231.

It is a cyclic number.

It is not a de Polignac number, because 13221366743 - 2⁴ = 13221366727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13221366697 and 13221366706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221366043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2920880 + ... + 2925402.

It is an arithmetic number, because the mean of its divisors is an integer number (902918016).

Almost surely, 2^13221366743 is an apocalyptic number.

13221366743 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13221366743 is a deficient number, since it is larger than the sum of its proper divisors (1225321513).

13221366743 is a wasteful number, since it uses less digits than its factorization.

13221366743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7774.

The product of its digits is 108864, while the sum is 38.

Adding to 13221366743 its reverse (34766312231), we get a palindrome (47987678974).

The spelling of 13221366743 in words is "thirteen billion, two hundred twenty-one million, three hundred sixty-six thousand, seven hundred forty-three".