221042112 has 56 divisors (see below), whose sum is σ = 593604096. Its totient is φ = 72576768.

The previous prime is 221042093. The next prime is 221042113. The reversal of 221042112 is 211240122.

It is a junction number, because it is equal to n+sod(n) for n = 221042091 and 221042100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221042113) 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 7 ways as a sum of consecutive naturals, for example, 4273 + ... + 21455.

Almost surely, 2^221042112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221042112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296802048).

221042112 is an abundant number, since it is smaller than the sum of its proper divisors (372561984).

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

221042112 is a wasteful number, since it uses less digits than its factorization.

221042112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17265 (or 17255 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 221042112 is about 14867.4850596865. The cubic root of 221042112 is about 604.6327593911.

Adding to 221042112 its reverse (211240122), we get a palindrome (432282234).

The spelling of 221042112 in words is "two hundred twenty-one million, forty-two thousand, one hundred twelve".