222111011220 has 72 divisors (see below), whose sum is σ = 723447303264. Its totient is φ = 50768230464.

The previous prime is 222111011189. The next prime is 222111011273. The reversal of 222111011220 is 22110111222.

222111011220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222111011220.

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 23 ways as a sum of consecutive naturals, for example, 37771042 + ... + 37776921.

It is an arithmetic number, because the mean of its divisors is an integer number (10047879212).

Almost surely, 2^222111011220 is an apocalyptic number.

222111011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222111011220 is an abundant number, since it is smaller than the sum of its proper divisors (501336292044).

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

222111011220 is a wasteful number, since it uses less digits than its factorization.

222111011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75547989 (or 75547980 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 222111011220 its reverse (22110111222), we get a palindrome (244221122442).

The spelling of 222111011220 in words is "two hundred twenty-two billion, one hundred eleven million, eleven thousand, two hundred twenty".