12111223 has 4 divisors (see below), whose sum is σ = 12224520. Its totient is φ = 11997928.

The previous prime is 12111221. The next prime is 12111263. The reversal of 12111223 is 32211121.

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 12111223 - 2¹ = 12111221 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 (12111221) 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, 56488 + ... + 56701.

It is an arithmetic number, because the mean of its divisors is an integer number (3056130).

Almost surely, 2^12111223 is an apocalyptic number.

12111223 is a deficient number, since it is larger than the sum of its proper divisors (113297).

12111223 is a wasteful number, since it uses less digits than its factorization.

12111223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113296.

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

The square root of 12111223 is about 3480.1182451175. The cubic root of 12111223 is about 229.6479996831.

Adding to 12111223 its reverse (32211121), we get a palindrome (44322344).

The spelling of 12111223 in words is "twelve million, one hundred eleven thousand, two hundred twenty-three".