13352719721 has 4 divisors (see below), whose sum is σ = 14566603344. Its totient is φ = 12138836100.

The previous prime is 13352719673. The next prime is 13352719727. The reversal of 13352719721 is 12791725331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13352719721 - 2²² = 13348525417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13352719727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606941795 + ... + 606941816.

It is an arithmetic number, because the mean of its divisors is an integer number (3641650836).

Almost surely, 2^13352719721 is an apocalyptic number.

13352719721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13352719721 is a deficient number, since it is larger than the sum of its proper divisors (1213883623).

13352719721 is a wasteful number, since it uses less digits than its factorization.

13352719721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213883622.

The product of its digits is 79380, while the sum is 41.

The spelling of 13352719721 in words is "thirteen billion, three hundred fifty-two million, seven hundred nineteen thousand, seven hundred twenty-one".