13311020331 has 32 divisors (see below), whose sum is σ = 22962424320. Its totient is φ = 7462776672.

The previous prime is 13311020293. The next prime is 13311020339. The reversal of 13311020331 is 13302011331.

It is a happy number.

13311020331 is a `hidden beast` number, since 1 + 3 + 311 + 0 + 20 + 331 = 666.

It is not a de Polignac number, because 13311020331 - 2¹⁰ = 13311019307 is a prime.

It is a super-2 number, since 2×13311020331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13311020339) 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, 654405 + ... + 674438.

It is an arithmetic number, because the mean of its divisors is an integer number (717575760).

Almost surely, 2^13311020331 is an apocalyptic number.

13311020331 is a deficient number, since it is larger than the sum of its proper divisors (9651403989).

13311020331 is a wasteful number, since it uses less digits than its factorization.

13311020331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328912 (or 1328906 counting only the distinct ones).

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

Adding to 13311020331 its reverse (13302011331), we get a palindrome (26613031662).

The spelling of 13311020331 in words is "thirteen billion, three hundred eleven million, twenty thousand, three hundred thirty-one".