13211112321 has 12 divisors (see below), whose sum is σ = 20817510480. Its totient is φ = 8006734680.

The previous prime is 13211112311. The next prime is 13211112379. The reversal of 13211112321 is 12321111231.

13211112321 is a `hidden beast` number, since 1 + 321 + 11 + 12 + 321 = 666.

It is not a de Polignac number, because 13211112321 - 2⁵ = 13211112289 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13211112294 and 13211112303.

It is not an unprimeable number, because it can be changed into a prime (13211112311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66722691 + ... + 66722888.

It is an arithmetic number, because the mean of its divisors is an integer number (1734792540).

Almost surely, 2^13211112321 is an apocalyptic number.

13211112321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13211112321 is a deficient number, since it is larger than the sum of its proper divisors (7606398159).

13211112321 is a wasteful number, since it uses less digits than its factorization.

13211112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133445596 (or 133445593 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 13211112321 its reverse (12321111231), we get a palindrome (25532223552).

The spelling of 13211112321 in words is "thirteen billion, two hundred eleven million, one hundred twelve thousand, three hundred twenty-one".