221021222202 has 48 divisors (see below), whose sum is σ = 536533107552. Its totient is φ = 65165960160.

The previous prime is 221021222183. The next prime is 221021222207. The reversal of 221021222202 is 202222120122.

221021222202 is a `hidden beast` number, since 221 + 0 + 21 + 222 + 202 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (221021222207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15077388 + ... + 15092039.

It is an arithmetic number, because the mean of its divisors is an integer number (11177773074).

Almost surely, 2^221021222202 is an apocalyptic number.

221021222202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221021222202 is an abundant number, since it is smaller than the sum of its proper divisors (315511885350).

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

221021222202 is a wasteful number, since it uses less digits than its factorization.

221021222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30169483 (or 30169480 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221021222202 its reverse (202222120122), we get a palindrome (423243342324).

The spelling of 221021222202 in words is "two hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, two hundred two".