221002112 has 32 divisors (see below), whose sum is σ = 450527880. Its totient is φ = 107928576.

The previous prime is 221002097. The next prime is 221002121. The reversal of 221002112 is 211200122.

It is a happy number.

221002112 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 221002093 and 221002102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14573 + ... + 25580.

Almost surely, 2^221002112 is an apocalyptic number.

It is an amenable number.

221002112 is an abundant number, since it is smaller than the sum of its proper divisors (229525768).

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

221002112 is an equidigital number, since it uses as much as digits as its factorization.

221002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40210 (or 40198 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 221002112 is about 14866.1397813958. The cubic root of 221002112 is about 604.5962855428.

Adding to 221002112 its reverse (211200122), we get a palindrome (432202234).

The spelling of 221002112 in words is "two hundred twenty-one million, two thousand, one hundred twelve".