11031320331 has 6 divisors (see below), whose sum is σ = 15934129380. Its totient is φ = 7354213548.

The previous prime is 11031320323. The next prime is 11031320351. The reversal of 11031320331 is 13302313011.

It is a happy number.

11031320331 is a `hidden beast` number, since 1 + 1 + 0 + 313 + 20 + 331 = 666.

It is not a de Polignac number, because 11031320331 - 2³ = 11031320323 is a prime.

It is a super-2 number, since 2×11031320331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11031320351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 612851121 + ... + 612851138.

It is an arithmetic number, because the mean of its divisors is an integer number (2655688230).

Almost surely, 2^11031320331 is an apocalyptic number.

11031320331 is a deficient number, since it is larger than the sum of its proper divisors (4902809049).

11031320331 is a wasteful number, since it uses less digits than its factorization.

11031320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225702265 (or 1225702262 counting only the distinct ones).

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

Adding to 11031320331 its reverse (13302313011), we get a palindrome (24333633342).

The spelling of 11031320331 in words is "eleven billion, thirty-one million, three hundred twenty thousand, three hundred thirty-one".