210221112 has 32 divisors (see below), whose sum is σ = 526798080. Its totient is φ = 69907680.

The previous prime is 210221107. The next prime is 210221119. The reversal of 210221112 is 211122012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221119) 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, 183 + ... + 20505.

It is an arithmetic number, because the mean of its divisors is an integer number (16462440).

Almost surely, 2^210221112 is an apocalyptic number.

It is an amenable number.

210221112 is an abundant number, since it is smaller than the sum of its proper divisors (316576968).

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

210221112 is a wasteful number, since it uses less digits than its factorization.

210221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20763 (or 20759 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 210221112 is about 14499.0038278497. The cubic root of 210221112 is about 594.6007367792.

Adding to 210221112 its reverse (211122012), we get a palindrome (421343124).

The spelling of 210221112 in words is "two hundred ten million, two hundred twenty-one thousand, one hundred twelve".