221111220120 has 192 divisors, whose sum is σ = 817023581280. Its totient is φ = 47566761984.

The previous prime is 221111220119. The next prime is 221111220133. The reversal of 221111220120 is 21022111122.

221111220120 is digitally balanced in base 3, 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 221111220120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1006039 + ... + 1205958.

Almost surely, 2^221111220120 is an apocalyptic number.

221111220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111220120 is an abundant number, since it is smaller than the sum of its proper divisors (595912361160).

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

221111220120 is a wasteful number, since it uses less digits than its factorization.

221111220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212042 (or 2212031 counting only the distinct ones).

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

Adding to 221111220120 its reverse (21022111122), we get a palindrome (242133331242).

The spelling of 221111220120 in words is "two hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty".