212520211 has 4 divisors (see below), whose sum is σ = 212874424. Its totient is φ = 212166000.

The previous prime is 212520173. The next prime is 212520223. The reversal of 212520211 is 112025212.

It is a happy number.

212520211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212520211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212520271) 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, 176205 + ... + 177406.

It is an arithmetic number, because the mean of its divisors is an integer number (53218606).

Almost surely, 2^212520211 is an apocalyptic number.

212520211 is a deficient number, since it is larger than the sum of its proper divisors (354213).

212520211 is an equidigital number, since it uses as much as digits as its factorization.

212520211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354212.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 212520211 is about 14578.0729522115. The cubic root of 212520211 is about 596.7605141786.

Adding to 212520211 its reverse (112025212), we get a palindrome (324545423).

The spelling of 212520211 in words is "two hundred twelve million, five hundred twenty thousand, two hundred eleven".