212220210 has 32 divisors (see below), whose sum is σ = 515471040. Its totient is φ = 55909568.

The previous prime is 212220191. The next prime is 212220247. The reversal of 212220210 is 12022212.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40125 + ... + 45104.

It is an arithmetic number, because the mean of its divisors is an integer number (16108470).

Almost surely, 2^212220210 is an apocalyptic number.

212220210 is an abundant number, since it is smaller than the sum of its proper divisors (303250830).

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

212220210 is a wasteful number, since it uses less digits than its factorization.

212220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85322.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 212220210 is about 14567.7798583037. The cubic root of 212220210 is about 596.4795792386.

Adding to 212220210 its reverse (12022212), we get a palindrome (224242422).

It can be divided in two parts, 2122202 and 10, that added together give a palindrome (2122212).

The spelling of 212220210 in words is "two hundred twelve million, two hundred twenty thousand, two hundred ten".