212112220120 has 96 divisors (see below), whose sum is σ = 509522166720. Its totient is φ = 79428884480.

The previous prime is 212112220087. The next prime is 212112220141. The reversal of 212112220120 is 21022211212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212112220094 and 212112220103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 887880 + ... + 1101160.

It is an arithmetic number, because the mean of its divisors is an integer number (5307522570).

Almost surely, 2^212112220120 is an apocalyptic number.

212112220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212112220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254761083360).

212112220120 is an abundant number, since it is smaller than the sum of its proper divisors (297409946600).

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

212112220120 is a wasteful number, since it uses less digits than its factorization.

212112220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213385 (or 213358 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212112220120 its reverse (21022211212), we get a palindrome (233134431332).

The spelling of 212112220120 in words is "two hundred twelve billion, one hundred twelve million, two hundred twenty thousand, one hundred twenty".