221222022220 has 24 divisors (see below), whose sum is σ = 464772723408. Its totient is φ = 88449480000.

The previous prime is 221222022199. The next prime is 221222022271. The reversal of 221222022220 is 22220222122.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2411911 + ... + 2501950.

It is an arithmetic number, because the mean of its divisors is an integer number (19365530142).

Almost surely, 2^221222022220 is an apocalyptic number.

221222022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222022220 is an abundant number, since it is smaller than the sum of its proper divisors (243550701188).

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

221222022220 is a wasteful number, since it uses less digits than its factorization.

221222022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916121 (or 4916119 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 221222022220 its reverse (22220222122), we get a palindrome (243442244342).

The spelling of 221222022220 in words is "two hundred twenty-one billion, two hundred twenty-two million, twenty-two thousand, two hundred twenty".