210221021211 has 8 divisors (see below), whose sum is σ = 280306977360. Its totient is φ = 140141206272.

The previous prime is 210221021173. The next prime is 210221021291. The reversal of 210221021211 is 112120122012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210221021211 - 2¹¹ = 210221019163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210221021291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1454826 + ... + 1592783.

It is an arithmetic number, because the mean of its divisors is an integer number (35038372170).

Almost surely, 2^210221021211 is an apocalyptic number.

210221021211 is a deficient number, since it is larger than the sum of its proper divisors (70085956149).

210221021211 is a wasteful number, since it uses less digits than its factorization.

210221021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3070605.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210221021211 its reverse (112120122012), we get a palindrome (322341143223).

The spelling of 210221021211 in words is "two hundred ten billion, two hundred twenty-one million, twenty-one thousand, two hundred eleven".