201221221210122 has 16 divisors (see below), whose sum is σ = 404911414461600. Its totient is φ = 66662245063152.

The previous prime is 201221221210117. The next prime is 201221221210181. The reversal of 201221221210122 is 221012122122102.

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, 102873833997 + ... + 102873835952.

It is an arithmetic number, because the mean of its divisors is an integer number (25306963403850).

Almost surely, 2^{201221221210122} is an apocalyptic number.

201221221210122 is an abundant number, since it is smaller than the sum of its proper divisors (203690193251478).

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

201221221210122 is a wasteful number, since it uses less digits than its factorization.

201221221210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205747670117.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 201221221210122 its reverse (221012122122102), we get a palindrome (422233343332224).

The spelling of 201221221210122 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-two".