201221221202210 has 64 divisors (see below), whose sum is σ = 416103249070080. Its totient is φ = 69289917117120.

The previous prime is 201221221202173. The next prime is 201221221202279. The reversal of 201221221202210 is 12202122122102.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16269164 + ... + 25828823.

It is an arithmetic number, because the mean of its divisors is an integer number (6501613266720).

Almost surely, 2^{201221221202210} is an apocalyptic number.

201221221202210 is an abundant number, since it is smaller than the sum of its proper divisors (214882027867870).

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

201221221202210 is a wasteful number, since it uses less digits than its factorization.

201221221202210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42100311.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 201221221202210 its reverse (12202122122102), we get a palindrome (213423343324312).

The spelling of 201221221202210 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred two thousand, two hundred ten".