211000212221 has 8 divisors (see below), whose sum is σ = 211324497600. Its totient is φ = 210676158720.

The previous prime is 211000212217. The next prime is 211000212239. The reversal of 211000212221 is 122212000112.

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 211000212221 - 2² = 211000212217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211000212196 and 211000212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211000212121) 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, 1809245 + ... + 1922333.

It is an arithmetic number, because the mean of its divisors is an integer number (26415562200).

Almost surely, 2^211000212221 is an apocalyptic number.

It is an amenable number.

211000212221 is a deficient number, since it is larger than the sum of its proper divisors (324285379).

211000212221 is a wasteful number, since it uses less digits than its factorization.

211000212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115939.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211000212221 its reverse (122212000112), we get a palindrome (333212212333).

The spelling of 211000212221 in words is "two hundred eleven billion, two hundred twelve thousand, two hundred twenty-one".