13221321211 has 4 divisors (see below), whose sum is σ = 15110081392. Its totient is φ = 11332561032.

The previous prime is 13221321193. The next prime is 13221321221. The reversal of 13221321211 is 11212312231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13221321211 - 2⁷ = 13221321083 is a prime.

It is a super-3 number, since 3×13221321211³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (13221321221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944380080 + ... + 944380093.

It is an arithmetic number, because the mean of its divisors is an integer number (3777520348).

Almost surely, 2^13221321211 is an apocalyptic number.

13221321211 is a deficient number, since it is larger than the sum of its proper divisors (1888760181).

13221321211 is an equidigital number, since it uses as much as digits as its factorization.

13221321211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888760180.

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

Adding to 13221321211 its reverse (11212312231), we get a palindrome (24433633442).

The spelling of 13221321211 in words is "thirteen billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred eleven".