210010212221 has 4 divisors (see below), whose sum is σ = 211613343744. Its totient is φ = 208407080700.

The previous prime is 210010212187. The next prime is 210010212277. The reversal of 210010212221 is 122212010012.

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 210010212221 - 2¹⁰ = 210010211197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210010212196 and 210010212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210010212281) 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, 801565565 + ... + 801565826.

It is an arithmetic number, because the mean of its divisors is an integer number (52903335936).

Almost surely, 2^210010212221 is an apocalyptic number.

It is an amenable number.

210010212221 is a deficient number, since it is larger than the sum of its proper divisors (1603131523).

210010212221 is a wasteful number, since it uses less digits than its factorization.

210010212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603131522.

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

Adding to 210010212221 its reverse (122212010012), we get a palindrome (332222222233).

The spelling of 210010212221 in words is "two hundred ten billion, ten million, two hundred twelve thousand, two hundred twenty-one".