212102220120210 has 224 divisors, whose sum is σ = 654284820792960. Its totient is φ = 48473301775104.

The previous prime is 212102220120199. The next prime is 212102220120257. The reversal of 212102220120210 is 12021022201212.

It is a happy number.

212102220120210 is a `hidden beast` number, since 2 + 1 + 210 + 2 + 220 + 1 + 20 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 346851606 + ... + 347462574.

It is an arithmetic number, because the mean of its divisors is an integer number (2920914378540).

Almost surely, 2^{212102220120210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212102220120210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327142410396480).

212102220120210 is an abundant number, since it is smaller than the sum of its proper divisors (442182600672750).

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

212102220120210 is an equidigital number, since it uses as much as digits as its factorization.

212102220120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617804 (or 617789 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212102220120210 its reverse (12021022201212), we get a palindrome (224123242321422).

It can be divided in two parts, 2121022201202 and 10, that added together give a palindrome (2121022201212).

The spelling of 212102220120210 in words is "two hundred twelve trillion, one hundred two billion, two hundred twenty million, one hundred twenty thousand, two hundred ten".