221201202210 has 16 divisors (see below), whose sum is σ = 530882885376. Its totient is φ = 58986987248.

The previous prime is 221201202121. The next prime is 221201202251. The reversal of 221201202210 is 12202102122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221201202210.

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 7 ways as a sum of consecutive naturals, for example, 3686686674 + ... + 3686686733.

It is an arithmetic number, because the mean of its divisors is an integer number (33180180336).

Almost surely, 2^221201202210 is an apocalyptic number.

221201202210 is an abundant number, since it is smaller than the sum of its proper divisors (309681683166).

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

221201202210 is a wasteful number, since it uses less digits than its factorization.

221201202210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7373373417.

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

Adding to 221201202210 its reverse (12202102122), we get a palindrome (233403304332).

The spelling of 221201202210 in words is "two hundred twenty-one billion, two hundred one million, two hundred two thousand, two hundred ten".