21210300100211 has 4 divisors (see below), whose sum is σ = 21245242934592. Its totient is φ = 21175357265832.

The previous prime is 21210300100201. The next prime is 21210300100259. The reversal of 21210300100211 is 11200100301212.

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

It is a cyclic number.

It is not a de Polignac number, because 21210300100211 - 2¹⁸ = 21210299838067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210300100201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17471416280 + ... + 17471417493.

It is an arithmetic number, because the mean of its divisors is an integer number (5311310733648).

Almost surely, 2^{21210300100211} is an apocalyptic number.

21210300100211 is a deficient number, since it is larger than the sum of its proper divisors (34942834381).

21210300100211 is an equidigital number, since it uses as much as digits as its factorization.

21210300100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34942834380.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21210300100211 its reverse (11200100301212), we get a palindrome (32410400401423).

The spelling of 21210300100211 in words is "twenty-one trillion, two hundred ten billion, three hundred million, one hundred thousand, two hundred eleven".