222100220 has 12 divisors (see below), whose sum is σ = 466410504. Its totient is φ = 88840080.

The previous prime is 222100211. The next prime is 222100231. The reversal of 222100220 is 22001222.

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 3 ways as a sum of consecutive naturals, for example, 5552486 + ... + 5552525.

It is an arithmetic number, because the mean of its divisors is an integer number (38867542).

Almost surely, 2^222100220 is an apocalyptic number.

222100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222100220 is an abundant number, since it is smaller than the sum of its proper divisors (244310284).

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

222100220 is a wasteful number, since it uses less digits than its factorization.

222100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11105020 (or 11105018 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 222100220 is about 14903.0272092619. The cubic root of 222100220 is about 605.5959976107.

Adding to 222100220 its reverse (22001222), we get a palindrome (244101442).

The spelling of 222100220 in words is "two hundred twenty-two million, one hundred thousand, two hundred twenty".