13211221321 has 8 divisors (see below), whose sum is σ = 13940519040. Its totient is φ = 12494831712.

The previous prime is 13211221301. The next prime is 13211221327. The reversal of 13211221321 is 12312211231.

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-13211221321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13211221327) 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, 3224925 + ... + 3229018.

It is an arithmetic number, because the mean of its divisors is an integer number (1742564880).

Almost surely, 2^13211221321 is an apocalyptic number.

It is an amenable number.

13211221321 is a deficient number, since it is larger than the sum of its proper divisors (729297719).

13211221321 is an equidigital number, since it uses as much as digits as its factorization.

13211221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454055.

The product of its digits is 144, while the sum is 19.

Adding to 13211221321 its reverse (12312211231), we get a palindrome (25523432552).

The spelling of 13211221321 in words is "thirteen billion, two hundred eleven million, two hundred twenty-one thousand, three hundred twenty-one".