212707211 has 4 divisors (see below), whose sum is σ = 214062192. Its totient is φ = 211352232.

The previous prime is 212707169. The next prime is 212707217. The reversal of 212707211 is 112707212.

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

It is a cyclic number.

It is not a de Polignac number, because 212707211 - 2¹⁰ = 212706187 is a prime.

It is a super-2 number, since 2×212707211² = 90488715222797042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212707217) 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, 677255 + ... + 677568.

It is an arithmetic number, because the mean of its divisors is an integer number (53515548).

Almost surely, 2^212707211 is an apocalyptic number.

212707211 is a deficient number, since it is larger than the sum of its proper divisors (1354981).

212707211 is a wasteful number, since it uses less digits than its factorization.

212707211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354980.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 212707211 is about 14584.4852840270. The cubic root of 212707211 is about 596.9354959689.

Subtracting from 212707211 its reverse (112707212), we obtain a palindrome (99999999).

The spelling of 212707211 in words is "two hundred twelve million, seven hundred seven thousand, two hundred eleven".