201221210210 has 32 divisors (see below), whose sum is σ = 381688008192. Its totient is φ = 76226708800.

The previous prime is 201221210173. The next prime is 201221210213. The reversal of 201221210210 is 12012122102.

201221210210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201221210213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4307834 + ... + 4354293.

It is an arithmetic number, because the mean of its divisors is an integer number (11927750256).

Almost surely, 2^201221210210 is an apocalyptic number.

201221210210 is a deficient number, since it is larger than the sum of its proper divisors (180466797982).

201221210210 is a wasteful number, since it uses less digits than its factorization.

201221210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8662258.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201221210210 its reverse (12012122102), we get a palindrome (213233332312).

The spelling of 201221210210 in words is "two hundred one billion, two hundred twenty-one million, two hundred ten thousand, two hundred ten".