211211206 has 8 divisors (see below), whose sum is σ = 316910160. Its totient is φ = 105574488.

The previous prime is 211211191. The next prime is 211211243. The reversal of 211211206 is 602112112.

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

It is a super-2 number, since 2×211211206² = 89220347079948872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211211206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5866 + ... + 21373.

It is an arithmetic number, because the mean of its divisors is an integer number (39613770).

Almost surely, 2^211211206 is an apocalyptic number.

211211206 is a deficient number, since it is larger than the sum of its proper divisors (105698954).

211211206 is a wasteful number, since it uses less digits than its factorization.

211211206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31118.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 211211206 is about 14533.1072383025. The cubic root of 211211206 is about 595.5327535426.

Adding to 211211206 its reverse (602112112), we get a palindrome (813323318).

The spelling of 211211206 in words is "two hundred eleven million, two hundred eleven thousand, two hundred six".