221112112 has 20 divisors (see below), whose sum is σ = 461359360. Its totient is φ = 102051648.

The previous prime is 221112071. The next prime is 221112113. The reversal of 221112112 is 211211122.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 221112092 and 221112101.

It is not an unprimeable number, because it can be changed into a prime (221112113) 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, 531312 + ... + 531727.

It is an arithmetic number, because the mean of its divisors is an integer number (23067968).

Almost surely, 2^221112112 is an apocalyptic number.

It is an amenable number.

221112112 is an abundant number, since it is smaller than the sum of its proper divisors (240247248).

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

221112112 is a wasteful number, since it uses less digits than its factorization.

221112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063060 (or 1063054 counting only the distinct ones).

The product of its digits is 16, while the sum is 13.

The square root of 221112112 is about 14869.8390038359. The cubic root of 221112112 is about 604.6965780390.

Adding to 221112112 its reverse (211211122), we get a palindrome (432323234).

The spelling of 221112112 in words is "two hundred twenty-one million, one hundred twelve thousand, one hundred twelve".