13211130221 has 4 divisors (see below), whose sum is σ = 13637295744. Its totient is φ = 12784964700.

The previous prime is 13211130203. The next prime is 13211130227. The reversal of 13211130221 is 12203111231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12203111231 = 29 ⋅420796939.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13211130221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13211130221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211130227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213082715 + ... + 213082776.

It is an arithmetic number, because the mean of its divisors is an integer number (3409323936).

Almost surely, 2^13211130221 is an apocalyptic number.

It is an amenable number.

13211130221 is a deficient number, since it is larger than the sum of its proper divisors (426165523).

13211130221 is an equidigital number, since it uses as much as digits as its factorization.

13211130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426165522.

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

Adding to 13211130221 its reverse (12203111231), we get a palindrome (25414241452).

The spelling of 13211130221 in words is "thirteen billion, two hundred eleven million, one hundred thirty thousand, two hundred twenty-one".