201022200122221 has 8 divisors (see below), whose sum is σ = 203095020658040. Its totient is φ = 198949388295168.

The previous prime is 201022200122213. The next prime is 201022200122239. The reversal of 201022200122221 is 122221002220102.

It can be written as a sum of positive squares in 4 ways, for example, as 74192123845225 + 126830076276996 = 8613485^2 + 11261886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201022200122221 - 2³ = 201022200122213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201022200129221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 50850865 + ... + 54661273.

It is an arithmetic number, because the mean of its divisors is an integer number (25386877582255).

Almost surely, 2^{201022200122221} is an apocalyptic number.

It is an amenable number.

201022200122221 is a deficient number, since it is larger than the sum of its proper divisors (2072820535819).

201022200122221 is an equidigital number, since it uses as much as digits as its factorization.

201022200122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4354383.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 201022200122221 its reverse (122221002220102), we get a palindrome (323243202342323).

The spelling of 201022200122221 in words is "two hundred one trillion, twenty-two billion, two hundred million, one hundred twenty-two thousand, two hundred twenty-one".