212000221 has 8 divisors (see below), whose sum is σ = 217217664. Its totient is φ = 206812320.

The previous prime is 212000219. The next prime is 212000267. The reversal of 212000221 is 122000212.

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 212000221 - 2¹ = 212000219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212000198 and 212000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212000281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7506 + ... + 21916.

It is an arithmetic number, because the mean of its divisors is an integer number (27152208).

Almost surely, 2^212000221 is an apocalyptic number.

It is an amenable number.

212000221 is a deficient number, since it is larger than the sum of its proper divisors (5217443).

212000221 is a wasteful number, since it uses less digits than its factorization.

212000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14771.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 212000221 is about 14560.2273677302. The cubic root of 212000221 is about 596.2734029699.

Adding to 212000221 its reverse (122000212), we get a palindrome (334000433).

Subtracting from 212000221 its reverse (122000212), we obtain a palindrome (90000009).

The spelling of 212000221 in words is "two hundred twelve million, two hundred twenty-one", and thus it is an aban number.