201221210202 has 32 divisors (see below), whose sum is σ = 407172153024. Its totient is φ = 66287424000.

The previous prime is 201221210173. The next prime is 201221210213. The reversal of 201221210202 is 202012122102.

201221210202 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161377 + ... + 654587.

It is an arithmetic number, because the mean of its divisors is an integer number (12724129782).

Almost surely, 2^201221210202 is an apocalyptic number.

201221210202 is an abundant number, since it is smaller than the sum of its proper divisors (205950942822).

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

201221210202 is a wasteful number, since it uses less digits than its factorization.

201221210202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494014.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201221210202 its reverse (202012122102), we get a palindrome (403233332304).

The spelling of 201221210202 in words is "two hundred one billion, two hundred twenty-one million, two hundred ten thousand, two hundred two".