210221612 has 12 divisors (see below), whose sum is σ = 373379160. Its totient is φ = 103541856.

The previous prime is 210221603. The next prime is 210221623. The reversal of 210221612 is 216122012.

210221612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391937 + ... + 392472.

It is an arithmetic number, because the mean of its divisors is an integer number (31114930).

Almost surely, 2^210221612 is an apocalyptic number.

It is an amenable number.

210221612 is a deficient number, since it is larger than the sum of its proper divisors (163157548).

210221612 is a wasteful number, since it uses less digits than its factorization.

210221612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784480 (or 784478 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 210221612 is about 14499.0210704033. The cubic root of 210221612 is about 594.6012081878.

Adding to 210221612 its reverse (216122012), we get a palindrome (426343624).

The spelling of 210221612 in words is "two hundred ten million, two hundred twenty-one thousand, six hundred twelve".