211206000221 has 8 divisors (see below), whose sum is σ = 216584565120. Its totient is φ = 205848653472.

The previous prime is 211206000209. The next prime is 211206000227. The reversal of 211206000221 is 122000602112.

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

It is a cyclic number.

It is not a de Polignac number, because 211206000221 - 2²² = 211201805917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 211206000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211206000227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5284376 + ... + 5324193.

It is an arithmetic number, because the mean of its divisors is an integer number (27073070640).

Almost surely, 2^211206000221 is an apocalyptic number.

It is an amenable number.

211206000221 is a deficient number, since it is larger than the sum of its proper divisors (5378564899).

211206000221 is a wasteful number, since it uses less digits than its factorization.

211206000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10609075.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211206000221 its reverse (122000602112), we get a palindrome (333206602333).

The spelling of 211206000221 in words is "two hundred eleven billion, two hundred six million, two hundred twenty-one", and thus it is an aban number.