11231320111 has 16 divisors (see below), whose sum is σ = 12419228160. Its totient is φ = 10071472320.

The previous prime is 11231320073. The next prime is 11231320157. The reversal of 11231320111 is 11102313211.

It is a happy number.

11231320111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11231320111 - 2⁹ = 11231319599 is a prime.

It is a super-2 number, since 2×11231320111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231360111) 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 15 ways as a sum of consecutive naturals, for example, 1005091 + ... + 1016203.

It is an arithmetic number, because the mean of its divisors is an integer number (776201760).

Almost surely, 2^11231320111 is an apocalyptic number.

11231320111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11231320111 is a deficient number, since it is larger than the sum of its proper divisors (1187908049).

11231320111 is a wasteful number, since it uses less digits than its factorization.

11231320111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12366.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11231320111 its reverse (11102313211), we get a palindrome (22333633322).

The spelling of 11231320111 in words is "eleven billion, two hundred thirty-one million, three hundred twenty thousand, one hundred eleven".