221200021201 has 48 divisors (see below), whose sum is σ = 250015248000. Its totient is φ = 194988197376.

The previous prime is 221200021199. The next prime is 221200021213. The reversal of 221200021201 is 102120002122.

It is a happy number.

It is not a de Polignac number, because 221200021201 - 2¹ = 221200021199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221200021241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 297711636 + ... + 297712378.

It is an arithmetic number, because the mean of its divisors is an integer number (5208651000).

Almost surely, 2^221200021201 is an apocalyptic number.

It is an amenable number.

221200021201 is a deficient number, since it is larger than the sum of its proper divisors (28815226799).

221200021201 is a wasteful number, since it uses less digits than its factorization.

221200021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221200021201 its reverse (102120002122), we get a palindrome (323320023323).

The spelling of 221200021201 in words is "two hundred twenty-one billion, two hundred million, twenty-one thousand, two hundred one".