13011320331 has 24 divisors (see below), whose sum is σ = 19477181040. Its totient is φ = 8584621056.

The previous prime is 13011320323. The next prime is 13011320353. The reversal of 13011320331 is 13302311031.

It is a happy number.

13011320331 is a `hidden beast` number, since 1 + 3 + 0 + 11 + 320 + 331 = 666.

13011320331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13011320331 - 2³ = 13011320323 is a prime.

It is a super-2 number, since 2×13011320331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13011324331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228435 + ... + 279651.

It is an arithmetic number, because the mean of its divisors is an integer number (811549210).

Almost surely, 2^13011320331 is an apocalyptic number.

13011320331 is a deficient number, since it is larger than the sum of its proper divisors (6465860709).

13011320331 is an frugal number, since it uses more digits than its factorization.

13011320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51420 (or 51317 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 13011320331 its reverse (13302311031), we get a palindrome (26313631362).

The spelling of 13011320331 in words is "thirteen billion, eleven million, three hundred twenty thousand, three hundred thirty-one".