11211223 has 4 divisors (see below), whose sum is σ = 11243880. Its totient is φ = 11178568.

The previous prime is 11211217. The next prime is 11211229. The reversal of 11211223 is 32211211.

11211223 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32211211 = 1097 ⋅29363.

It is an interprime number because it is at equal distance from previous prime (11211217) and next prime (11211229).

It is a cyclic number.

It is not a de Polignac number, because 11211223 - 2¹⁷ = 11080151 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 (11211229) 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 3 ways as a sum of consecutive naturals, for example, 15808 + ... + 16501.

It is an arithmetic number, because the mean of its divisors is an integer number (2810970).

Almost surely, 2^11211223 is an apocalyptic number.

11211223 is a deficient number, since it is larger than the sum of its proper divisors (32657).

11211223 is an equidigital number, since it uses as much as digits as its factorization.

11211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32656.

The product of its digits is 24, while the sum is 13.

The square root of 11211223 is about 3348.3164426320. The cubic root of 11211223 is about 223.8124958849.

Adding to 11211223 its reverse (32211211), we get a palindrome (43422434).

The spelling of 11211223 in words is "eleven million, two hundred eleven thousand, two hundred twenty-three".