11111243223 has 4 divisors (see below), whose sum is σ = 14814990968. Its totient is φ = 7407495480.

The previous prime is 11111243219. The next prime is 11111243233. The reversal of 11111243223 is 32234211111.

11111243223 is digitally balanced in base 2, 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.

It is not a de Polignac number, because 11111243223 - 2² = 11111243219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11111243223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111243233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851873868 + ... + 1851873873.

It is an arithmetic number, because the mean of its divisors is an integer number (3703747742).

Almost surely, 2^11111243223 is an apocalyptic number.

11111243223 is a deficient number, since it is larger than the sum of its proper divisors (3703747745).

11111243223 is an equidigital number, since it uses as much as digits as its factorization.

11111243223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703747744.

The product of its digits is 288, while the sum is 21.

Adding to 11111243223 its reverse (32234211111), we get a palindrome (43345454334).

The spelling of 11111243223 in words is "eleven billion, one hundred eleven million, two hundred forty-three thousand, two hundred twenty-three".