11011223 has 4 divisors (see below), whose sum is σ = 11658960. Its totient is φ = 10363488.

The previous prime is 11011211. The next prime is 11011243. The reversal of 11011223 is 32211011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11011223 - 2⁶ = 11011159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011243) 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, 323843 + ... + 323876.

It is an arithmetic number, because the mean of its divisors is an integer number (2914740).

Almost surely, 2^11011223 is an apocalyptic number.

11011223 is a deficient number, since it is larger than the sum of its proper divisors (647737).

11011223 is an equidigital number, since it uses as much as digits as its factorization.

11011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647736.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 11011223 is about 3318.3162899278. The cubic root of 11011223 is about 222.4736188896.

Adding to 11011223 its reverse (32211011), we get a palindrome (43222234).

The spelling of 11011223 in words is "eleven million, eleven thousand, two hundred twenty-three".