11109231 has 42 divisors (see below), whose sum is σ = 19437912. Its totient is φ = 6327720.

The previous prime is 11109227. The next prime is 11109289. The reversal of 11109231 is 13290111.

It is not a de Polignac number, because 11109231 - 2² = 11109227 is a prime.

It is a super-2 number, since 2×11109231² = 246830026822722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11109031) 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 41 ways as a sum of consecutive naturals, for example, 35566 + ... + 35876.

Almost surely, 2^11109231 is an apocalyptic number.

11109231 is a deficient number, since it is larger than the sum of its proper divisors (8328681).

11109231 is an frugal number, since it uses more digits than its factorization.

11109231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 11109231 is about 3333.0513047356. The cubic root of 11109231 is about 223.1317299008.

Adding to 11109231 its reverse (13290111), we get a palindrome (24399342).

The spelling of 11109231 in words is "eleven million, one hundred nine thousand, two hundred thirty-one".