212221220120 has 128 divisors (see below), whose sum is σ = 602023847040. Its totient is φ = 65526312960.

The previous prime is 212221220093. The next prime is 212221220177. The reversal of 212221220120 is 21022122212.

It is a happy number.

212221220120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 561767 + ... + 860246.

It is an arithmetic number, because the mean of its divisors is an integer number (4703311305).

Almost surely, 2^212221220120 is an apocalyptic number.

212221220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221220120 is an abundant number, since it is smaller than the sum of its proper divisors (389802626920).

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

212221220120 is a wasteful number, since it uses less digits than its factorization.

212221220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422085 (or 1422081 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212221220120 its reverse (21022122212), we get a palindrome (233243342332).

The spelling of 212221220120 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty".