210212000221 has 4 divisors (see below), whose sum is σ = 210213057852. Its totient is φ = 210210942592.

The previous prime is 210212000213. The next prime is 210212000239. The reversal of 210212000221 is 122000212012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 104983128121 + 105228872100 = 324011^2 + 324390^2 .

It is a cyclic number.

It is not a de Polignac number, because 210212000221 - 2³ = 210212000213 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 (210212000261) 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, 130846 + ... + 661471.

It is an arithmetic number, because the mean of its divisors is an integer number (52553264463).

Almost surely, 2^210212000221 is an apocalyptic number.

It is an amenable number.

210212000221 is a deficient number, since it is larger than the sum of its proper divisors (1057631).

210212000221 is an equidigital number, since it uses as much as digits as its factorization.

210212000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057630.

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

Adding to 210212000221 its reverse (122000212012), we get a palindrome (332212212233).

The spelling of 210212000221 in words is "two hundred ten billion, two hundred twelve million, two hundred twenty-one", and thus it is an aban number.