212000210221 has 4 divisors (see below), whose sum is σ = 216930447712. Its totient is φ = 207069972732.

The previous prime is 212000210179. The next prime is 212000210249. The reversal of 212000210221 is 122012000212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212000210221 - 2⁹ = 212000209709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212000210321) 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, 2465118681 + ... + 2465118766.

It is an arithmetic number, because the mean of its divisors is an integer number (54232611928).

Almost surely, 2^212000210221 is an apocalyptic number.

It is an amenable number.

212000210221 is a deficient number, since it is larger than the sum of its proper divisors (4930237491).

212000210221 is an equidigital number, since it uses as much as digits as its factorization.

212000210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4930237490.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212000210221 its reverse (122012000212), we get a palindrome (334012210433).

The spelling of 212000210221 in words is "two hundred twelve billion, two hundred ten thousand, two hundred twenty-one".