221100112 has 40 divisors (see below), whose sum is σ = 458358560. Its totient is φ = 103006080.

The previous prime is 221100107. The next prime is 221100133. The reversal of 221100112 is 211001122.

It is a congruent number.

It is an unprimeable number.

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, 12583 + ... + 24505.

It is an arithmetic number, because the mean of its divisors is an integer number (11458964).

Almost surely, 2^221100112 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 221100112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229179280).

221100112 is an abundant number, since it is smaller than the sum of its proper divisors (237258448).

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

221100112 is a wasteful number, since it uses less digits than its factorization.

221100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12011 (or 12005 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 221100112 is about 14869.4354970187. The cubic root of 221100112 is about 604.6856386560.

Adding to 221100112 its reverse (211001122), we get a palindrome (432101234).

It can be divided in two parts, 2 and 21100112, that multiplied together give a palindrome (42200224).

The spelling of 221100112 in words is "two hundred twenty-one million, one hundred thousand, one hundred twelve".