201022221212022 has 128 divisors (see below), whose sum is σ = 475155634028544. Its totient is φ = 55506819166848.

The previous prime is 201022221211979. The next prime is 201022221212039. The reversal of 201022221212022 is 220212122220102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 201022221212022.

It is a congruent 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 63 ways as a sum of consecutive naturals, for example, 316389223 + ... + 317023949.

It is an arithmetic number, because the mean of its divisors is an integer number (3712153390848).

Almost surely, 2^{201022221212022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201022221212022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237577817014272).

201022221212022 is an abundant number, since it is smaller than the sum of its proper divisors (274133412816522).

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

201022221212022 is a wasteful number, since it uses less digits than its factorization.

201022221212022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636802.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 201022221212022 its reverse (220212122220102), we get a palindrome (421234343432124).

The spelling of 201022221212022 in words is "two hundred one trillion, twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, twenty-two".