210011210221 has 4 divisors (see below), whose sum is σ = 210013266844. Its totient is φ = 210009153600.

The previous prime is 210011210173. The next prime is 210011210243. The reversal of 210011210221 is 122012110012.

210011210221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 160344184900 + 49667025321 = 400430^2 + 222861^2 .

It is a cyclic number.

It is not a de Polignac number, because 210011210221 - 2¹³ = 210011202029 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 (210011210621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866670 + ... + 1082191.

It is an arithmetic number, because the mean of its divisors is an integer number (52503316711).

Almost surely, 2^210011210221 is an apocalyptic number.

It is an amenable number.

210011210221 is a deficient number, since it is larger than the sum of its proper divisors (2056623).

210011210221 is a wasteful number, since it uses less digits than its factorization.

210011210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056622.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210011210221 its reverse (122012110012), we get a palindrome (332023320233).

The spelling of 210011210221 in words is "two hundred ten billion, eleven million, two hundred ten thousand, two hundred twenty-one".