221222224220 has 24 divisors (see below), whose sum is σ = 464576936208. Its totient is φ = 88486934400.

The previous prime is 221222224207. The next prime is 221222224231. The reversal of 221222224220 is 22422222122.

221222224220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107200 + ... + 1291640.

It is an arithmetic number, because the mean of its divisors is an integer number (19357372342).

Almost surely, 2^221222224220 is an apocalyptic number.

221222224220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222224220 is an abundant number, since it is smaller than the sum of its proper divisors (243354711988).

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

221222224220 is a wasteful number, since it uses less digits than its factorization.

221222224220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244421 (or 244419 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 221222224220 its reverse (22422222122), we get a palindrome (243644446342).

The spelling of 221222224220 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-four thousand, two hundred twenty".