221222021220222 has 64 divisors (see below), whose sum is σ = 500352293836800. Its totient is φ = 64590229988480.

The previous prime is 221222021220203. The next prime is 221222021220229. The reversal of 221222021220222 is 222022120222122.

It is a junction number, because it is equal to n+sod(n) for n = 221222021220192 and 221222021220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222021220229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119731413 + ... + 121565024.

It is an arithmetic number, because the mean of its divisors is an integer number (7818004591200).

Almost surely, 2^{221222021220222} is an apocalyptic number.

221222021220222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221222021220222 is an abundant number, since it is smaller than the sum of its proper divisors (279130272616578).

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

221222021220222 is a wasteful number, since it uses less digits than its factorization.

221222021220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241296961.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 221222021220222 its reverse (222022120222122), we get a palindrome (443244141442344).

The spelling of 221222021220222 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, twenty-one million, two hundred twenty thousand, two hundred twenty-two".