11111223 has 8 divisors (see below), whose sum is σ = 15130368. Its totient is φ = 7249784.

The previous prime is 11111209. The next prime is 11111267. The reversal of 11111223 is 32211111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11111223 - 2⁹ = 11110711 is a prime.

It is a plaindrome in base 10.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 11111199 and 11111208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111273) 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 7 ways as a sum of consecutive naturals, for example, 39261 + ... + 39542.

It is an arithmetic number, because the mean of its divisors is an integer number (1891296).

Almost surely, 2^11111223 is an apocalyptic number.

11111223 is a deficient number, since it is larger than the sum of its proper divisors (4019145).

11111223 is an equidigital number, since it uses as much as digits as its factorization.

11111223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78853.

The product of its digits is 12, while the sum is 12.

The square root of 11111223 is about 3333.3501166244. The cubic root of 11111223 is about 223.1450657126.

Adding to 11111223 its reverse (32211111), we get a palindrome (43322334).

The spelling of 11111223 in words is "eleven million, one hundred eleven thousand, two hundred twenty-three".