13235668221 has 8 divisors (see below), whose sum is σ = 17653648320. Its totient is φ = 8820733472.

The previous prime is 13235668211. The next prime is 13235668253. The reversal of 13235668221 is 12286653231.

It is a happy number.

13235668221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13235668221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13235668221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13235668211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751176 + ... + 768593.

It is an arithmetic number, because the mean of its divisors is an integer number (2206706040).

Almost surely, 2^13235668221 is an apocalyptic number.

It is an amenable number.

13235668221 is a deficient number, since it is larger than the sum of its proper divisors (4417980099).

13235668221 is a wasteful number, since it uses less digits than its factorization.

13235668221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522675.

The product of its digits is 103680, while the sum is 39.

The spelling of 13235668221 in words is "thirteen billion, two hundred thirty-five million, six hundred sixty-eight thousand, two hundred twenty-one".