111421223 has 18 divisors (see below), whose sum is σ = 121853016. Its totient is φ = 101686200.

The previous prime is 111421183. The next prime is 111421243. The reversal of 111421223 is 322124111.

It is not a de Polignac number, because 111421223 - 2¹⁶ = 111355687 is a prime.

It is a hoax number, since the sum of its digits (17) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111421243) 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 17 ways as a sum of consecutive naturals, for example, 1569278 + ... + 1569348.

It is an arithmetic number, because the mean of its divisors is an integer number (6769612).

Almost surely, 2^111421223 is an apocalyptic number.

111421223 is a deficient number, since it is larger than the sum of its proper divisors (10431793).

111421223 is an frugal number, since it uses more digits than its factorization.

111421223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 125 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 111421223 is about 10555.6251828113. The cubic root of 111421223 is about 481.1967000509.

Adding to 111421223 its reverse (322124111), we get a palindrome (433545334).

The spelling of 111421223 in words is "one hundred eleven million, four hundred twenty-one thousand, two hundred twenty-three".