201022212121221 has 32 divisors (see below), whose sum is σ = 275361493271040. Its totient is φ = 130351188473856.

The previous prime is 201022212121177. The next prime is 201022212121229. The reversal of 201022212121221 is 122121212220102.

It is not a de Polignac number, because 201022212121221 - 2²⁶ = 201022145012357 is a prime.

It is a super-2 number, since 2×201022212121221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201022212121229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5203900335 + ... + 5203938963.

It is an arithmetic number, because the mean of its divisors is an integer number (8605046664720).

Almost surely, 2^{201022212121221} is an apocalyptic number.

It is an amenable number.

201022212121221 is a deficient number, since it is larger than the sum of its proper divisors (74339281149819).

201022212121221 is a wasteful number, since it uses less digits than its factorization.

201022212121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52413.

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

Adding to 201022212121221 its reverse (122121212220102), we get a palindrome (323143424341323).

The spelling of 201022212121221 in words is "two hundred one trillion, twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".