111123312 has 20 divisors (see below), whose sum is σ = 287068680. Its totient is φ = 37041088.

The previous prime is 111123283. The next prime is 111123317. The reversal of 111123312 is 213321111.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 111123291 and 111123300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111123317) 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, 1157487 + ... + 1157582.

It is an arithmetic number, because the mean of its divisors is an integer number (14353434).

Almost surely, 2^111123312 is an apocalyptic number.

111123312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111123312 is an abundant number, since it is smaller than the sum of its proper divisors (175945368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111123312 is a wasteful number, since it uses less digits than its factorization.

111123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315080 (or 2315074 counting only the distinct ones).

The product of its digits is 36, while the sum is 15.

The square root of 111123312 is about 10541.5042569834. The cubic root of 111123312 is about 480.7674528518.

Adding to 111123312 its reverse (213321111), we get a palindrome (324444423).

The spelling of 111123312 in words is "one hundred eleven million, one hundred twenty-three thousand, three hundred twelve".