13211331318 has 48 divisors (see below), whose sum is σ = 29922048000. Its totient is φ = 4207759920.

The previous prime is 13211331317. The next prime is 13211331323. The reversal of 13211331318 is 81313311231.

It is a happy number.

13211331318 is a `hidden beast` number, since 1 + 3 + 2 + 11 + 331 + 318 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 13211331291 and 13211331300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211331317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105768 + ... + 193931.

It is an arithmetic number, because the mean of its divisors is an integer number (623376000).

Almost surely, 2^13211331318 is an apocalyptic number.

13211331318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13211331318 is an abundant number, since it is smaller than the sum of its proper divisors (16710716682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13211331318 is a wasteful number, since it uses less digits than its factorization.

13211331318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299817 (or 299814 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

Adding to 13211331318 its reverse (81313311231), we get a palindrome (94524642549).

The spelling of 13211331318 in words is "thirteen billion, two hundred eleven million, three hundred thirty-one thousand, three hundred eighteen".