13321020221 has 8 divisors (see below), whose sum is σ = 13476993024. Its totient is φ = 13165845840.

The previous prime is 13321020203. The next prime is 13321020281. The reversal of 13321020221 is 12202012331.

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-13321020221 is a prime.

It is a Duffinian number.

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 13321020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321020281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166010 + ... + 232811.

It is an arithmetic number, because the mean of its divisors is an integer number (1684624128).

Almost surely, 2^13321020221 is an apocalyptic number.

It is an amenable number.

13321020221 is a deficient number, since it is larger than the sum of its proper divisors (155972803).

13321020221 is a wasteful number, since it uses less digits than its factorization.

13321020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399211.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13321020221 its reverse (12202012331), we get a palindrome (25523032552).

The spelling of 13321020221 in words is "thirteen billion, three hundred twenty-one million, twenty thousand, two hundred twenty-one".