111212223 has 8 divisors (see below), whose sum is σ = 148628736. Its totient is φ = 73968600.

The previous prime is 111212203. The next prime is 111212239. The reversal of 111212223 is 322212111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111212223 - 2¹⁴ = 111195839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212203) 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 7 ways as a sum of consecutive naturals, for example, 41713 + ... + 44298.

It is an arithmetic number, because the mean of its divisors is an integer number (18578592).

Almost surely, 2^111212223 is an apocalyptic number.

111212223 is a deficient number, since it is larger than the sum of its proper divisors (37416513).

111212223 is an equidigital number, since it uses as much as digits as its factorization.

111212223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86445.

The product of its digits is 48, while the sum is 15.

The square root of 111212223 is about 10545.7206012676. The cubic root of 111212223 is about 480.8956411348.

Adding to 111212223 its reverse (322212111), we get a palindrome (433424334).

The spelling of 111212223 in words is "one hundred eleven million, two hundred twelve thousand, two hundred twenty-three".