212021210 has 8 divisors (see below), whose sum is σ = 381638196. Its totient is φ = 84808480.

The previous prime is 212021203. The next prime is 212021213. The reversal of 212021210 is 12120212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 203547289 + 8473921 = 14267^2 + 2911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 212021191 and 212021200.

It is not an unprimeable number, because it can be changed into a prime (212021213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10601051 + ... + 10601070.

Almost surely, 2^212021210 is an apocalyptic number.

212021210 is a deficient number, since it is larger than the sum of its proper divisors (169616986).

212021210 is a wasteful number, since it uses less digits than its factorization.

212021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21202128.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 212021210 is about 14560.9481147348. The cubic root of 212021210 is about 596.2930802598.

Adding to 212021210 its reverse (12120212), we get a palindrome (224141422).

The spelling of 212021210 in words is "two hundred twelve million, twenty-one thousand, two hundred ten".