201222021111210 has 288 divisors, whose sum is σ = 610378772225040. Its totient is φ = 45799349207040.

The previous prime is 201222021111203. The next prime is 201222021111253. The reversal of 201222021111210 is 12111120222102.

201222021111210 is a `hidden beast` number, since 2 + 0 + 12 + 220 + 211 + 11 + 210 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 179123720131521 + 22098300979689 = 13383711^2 + 4700883^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 74389414 + ... + 77046926.

Almost surely, 2^{201222021111210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201222021111210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305189386112520).

201222021111210 is an abundant number, since it is smaller than the sum of its proper divisors (409156751113830).

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

201222021111210 is a wasteful number, since it uses less digits than its factorization.

201222021111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657974 (or 2657960 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201222021111210 its reverse (12111120222102), we get a palindrome (213333141333312).

The spelling of 201222021111210 in words is "two hundred one trillion, two hundred twenty-two billion, twenty-one million, one hundred eleven thousand, two hundred ten".