212110210 has 24 divisors (see below), whose sum is σ = 413429940. Its totient is φ = 78316992.

The previous prime is 212110189. The next prime is 212110211. The reversal of 212110210 is 12011212.

It can be written as a sum of positive squares in 6 ways, for example, as 73977201 + 138133009 = 8601^2 + 11753^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (212110211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61065 + ... + 64444.

Almost surely, 2^212110210 is an apocalyptic number.

212110210 is a deficient number, since it is larger than the sum of its proper divisors (201319730).

212110210 is a wasteful number, since it uses less digits than its factorization.

212110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125542 (or 125529 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 212110210 is about 14564.0039137594. The cubic root of 212110210 is about 596.3765037691.

Adding to 212110210 its reverse (12011212), we get a palindrome (224121422).

The spelling of 212110210 in words is "two hundred twelve million, one hundred ten thousand, two hundred ten".