111223012123 has 4 divisors (see below), whose sum is σ = 112098784000. Its totient is φ = 110347240248.

The previous prime is 111223012097. The next prime is 111223012157. The reversal of 111223012123 is 321210322111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111223012123 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 111223012123.

It is not an unprimeable number, because it can be changed into a prime (111223016123) 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, 437885748 + ... + 437886001.

It is an arithmetic number, because the mean of its divisors is an integer number (28024696000).

Almost surely, 2^111223012123 is an apocalyptic number.

111223012123 is a deficient number, since it is larger than the sum of its proper divisors (875771877).

111223012123 is an equidigital number, since it uses as much as digits as its factorization.

111223012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875771876.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 111223012123 its reverse (321210322111), we get a palindrome (432433334234).

The spelling of 111223012123 in words is "one hundred eleven billion, two hundred twenty-three million, twelve thousand, one hundred twenty-three".