212112221030120 has 128 divisors (see below), whose sum is σ = 522783344678400. Its totient is φ = 77095687065600.

The previous prime is 212112221030117. The next prime is 212112221030159. The reversal of 212112221030120 is 21030122211212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 212112221030092 and 212112221030101.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328824305 + ... + 329468735.

It is an arithmetic number, because the mean of its divisors is an integer number (4084244880300).

Almost surely, 2^{212112221030120} is an apocalyptic number.

212112221030120 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 212112221030120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261391672339200).

212112221030120 is an abundant number, since it is smaller than the sum of its proper divisors (310671123648280).

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

212112221030120 is a wasteful number, since it uses less digits than its factorization.

212112221030120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661179 (or 661175 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 212112221030120 its reverse (21030122211212), we get a palindrome (233142343241332).

The spelling of 212112221030120 in words is "two hundred twelve trillion, one hundred twelve billion, two hundred twenty-one million, thirty thousand, one hundred twenty".