13331331321 has 32 divisors (see below), whose sum is σ = 22464780288. Its totient is φ = 6830490240.

The previous prime is 13331331319. The next prime is 13331331347. The reversal of 13331331321 is 12313313331.

It is not a de Polignac number, because 13331331321 - 2¹ = 13331331319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13331331291 and 13331331300.

It is not an unprimeable number, because it can be changed into a prime (13331331301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378421 + ... + 412146.

It is an arithmetic number, because the mean of its divisors is an integer number (702024384).

Almost surely, 2^13331331321 is an apocalyptic number.

13331331321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13331331321 is a deficient number, since it is larger than the sum of its proper divisors (9133448967).

13331331321 is a wasteful number, since it uses less digits than its factorization.

13331331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790661.

The product of its digits is 1458, while the sum is 24.

Adding to 13331331321 its reverse (12313313331), we get a palindrome (25644644652).

The spelling of 13331331321 in words is "thirteen billion, three hundred thirty-one million, three hundred thirty-one thousand, three hundred twenty-one".