201021122200122 has 48 divisors (see below), whose sum is σ = 511219739352192. Its totient is φ = 55882319683680.

The previous prime is 201021122200081. The next prime is 201021122200163. The reversal of 201021122200122 is 221002221120102.

It is a happy number.

201021122200122 is a `hidden beast` number, since 201 + 0 + 21 + 122 + 200 + 122 = 666.

It is an interprime number because it is at equal distance from previous prime (201021122200081) and next prime (201021122200163).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201021122200095 and 201021122200104.

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 23 ways as a sum of consecutive naturals, for example, 21559532254 + ... + 21559541577.

It is an arithmetic number, because the mean of its divisors is an integer number (10650411236504).

Almost surely, 2^{201021122200122} is an apocalyptic number.

201021122200122 is an abundant number, since it is smaller than the sum of its proper divisors (310198617152070).

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

201021122200122 is a wasteful number, since it uses less digits than its factorization.

201021122200122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43119073883 (or 43119073880 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201021122200122 its reverse (221002221120102), we get a palindrome (422023343320224).

The spelling of 201021122200122 in words is "two hundred one trillion, twenty-one billion, one hundred twenty-two million, two hundred thousand, one hundred twenty-two".