11131223 has 4 divisors (see below), whose sum is σ = 11139240. Its totient is φ = 11123208.

The previous prime is 11131187. The next prime is 11131229. The reversal of 11131223 is 32213111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11131223 - 2¹⁰ = 11130199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11131198 and 11131207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328 + ... + 4901.

It is an arithmetic number, because the mean of its divisors is an integer number (2784810).

Almost surely, 2^11131223 is an apocalyptic number.

11131223 is a deficient number, since it is larger than the sum of its proper divisors (8017).

11131223 is an equidigital number, since it uses as much as digits as its factorization.

11131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8016.

The product of its digits is 36, while the sum is 14.

The square root of 11131223 is about 3336.3487527535. The cubic root of 11131223 is about 223.2788711535.

Adding to 11131223 its reverse (32213111), we get a palindrome (43344334).

The spelling of 11131223 in words is "eleven million, one hundred thirty-one thousand, two hundred twenty-three".