13220111321 has 8 divisors (see below), whose sum is σ = 13420243584. Its totient is φ = 13020366240.

The previous prime is 13220111287. The next prime is 13220111363. The reversal of 13220111321 is 12311102231.

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

It is not a de Polignac number, because 13220111321 - 2¹⁰ = 13220110297 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 13220111321.

It is not an unprimeable number, because it can be changed into a prime (13220111371) 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, 27620 + ... + 164933.

It is an arithmetic number, because the mean of its divisors is an integer number (1677530448).

Almost surely, 2^13220111321 is an apocalyptic number.

It is an amenable number.

13220111321 is a deficient number, since it is larger than the sum of its proper divisors (200132263).

13220111321 is an equidigital number, since it uses as much as digits as its factorization.

13220111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193591.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13220111321 its reverse (12311102231), we get a palindrome (25531213552).

The spelling of 13220111321 in words is "thirteen billion, two hundred twenty million, one hundred eleven thousand, three hundred twenty-one".