11011231111 has 16 divisors (see below), whose sum is σ = 11477007360. Its totient is φ = 10556900640.

The previous prime is 11011231097. The next prime is 11011231129. The reversal of 11011231111 is 11113211011.

It is a cyclic number.

It is not a de Polignac number, because 11011231111 - 2¹¹ = 11011229063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011231091 and 11011231100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011231141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560310 + ... + 579628.

It is an arithmetic number, because the mean of its divisors is an integer number (717312960).

Almost surely, 2^11011231111 is an apocalyptic number.

11011231111 is a deficient number, since it is larger than the sum of its proper divisors (465776249).

11011231111 is a wasteful number, since it uses less digits than its factorization.

11011231111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19614.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 11011231111 its reverse (11113211011), we get a palindrome (22124442122).

The spelling of 11011231111 in words is "eleven billion, eleven million, two hundred thirty-one thousand, one hundred eleven".