210000212221212 has 144 divisors (see below), whose sum is σ = 617167365534720. Its totient is φ = 58962307948416.

The previous prime is 210000212221141. The next prime is 210000212221213. The reversal of 210000212221212 is 212122212000012.

It is a happy number.

210000212221212 is a `hidden beast` number, since 21 + 0 + 0 + 0 + 0 + 212 + 221 + 212 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210000212221213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39691213 + ... + 44669819.

It is an arithmetic number, because the mean of its divisors is an integer number (4285884482880).

Almost surely, 2^{210000212221212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210000212221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308583682767360).

210000212221212 is an abundant number, since it is smaller than the sum of its proper divisors (407167153313508).

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

210000212221212 is a wasteful number, since it uses less digits than its factorization.

210000212221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4981520 (or 4981515 counting only the distinct ones).

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

Adding to 210000212221212 its reverse (212122212000012), we get a palindrome (422122424221224).

The spelling of 210000212221212 in words is "two hundred ten trillion, two hundred twelve million, two hundred twenty-one thousand, two hundred twelve".