222221120020 has 12 divisors (see below), whose sum is σ = 466664352084. Its totient is φ = 88888448000.

The previous prime is 222221119943. The next prime is 222221120057. The reversal of 222221120020 is 20021122222.

222221120020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 24555516804 + 197665603216 = 156702^2 + 444596^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222221119976 and 222221120003.

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, 5555527981 + ... + 5555528020.

It is an arithmetic number, because the mean of its divisors is an integer number (38888696007).

Almost surely, 2^222221120020 is an apocalyptic number.

222221120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221120020 is an abundant number, since it is smaller than the sum of its proper divisors (244443232064).

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

222221120020 is a wasteful number, since it uses less digits than its factorization.

222221120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111056010 (or 11111056008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 222221120020 its reverse (20021122222), we get a palindrome (242242242242).

The spelling of 222221120020 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty thousand, twenty".