210221210 has 16 divisors (see below), whose sum is σ = 384047136. Its totient is φ = 82833168.

The previous prime is 210221191. The next prime is 210221233. The reversal of 210221210 is 12122012.

It is a happy number.

210221210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 210221191 and 210221200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156212 + ... + 157551.

It is an arithmetic number, because the mean of its divisors is an integer number (24002946).

Almost surely, 2^210221210 is an apocalyptic number.

210221210 is a deficient number, since it is larger than the sum of its proper divisors (173825926).

210221210 is a wasteful number, since it uses less digits than its factorization.

210221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313837.

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

The square root of 210221210 is about 14499.0072073918. The cubic root of 210221210 is about 594.6008291754.

Adding to 210221210 its reverse (12122012), we get a palindrome (222343222).

The spelling of 210221210 in words is "two hundred ten million, two hundred twenty-one thousand, two hundred ten".