21210000010211 has 4 divisors (see below), whose sum is σ = 21303436133832. Its totient is φ = 21116563886592.

The previous prime is 21210000010181. The next prime is 21210000010217. The reversal of 21210000010211 is 11201000001212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210000010211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210000010192 and 21210000010201.

It is not an unprimeable number, because it can be changed into a prime (21210000010217) 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, 46718061470 + ... + 46718061923.

It is an arithmetic number, because the mean of its divisors is an integer number (5325859033458).

Almost surely, 2^{21210000010211} is an apocalyptic number.

21210000010211 is a deficient number, since it is larger than the sum of its proper divisors (93436123621).

21210000010211 is an equidigital number, since it uses as much as digits as its factorization.

21210000010211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93436123620.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21210000010211 its reverse (11201000001212), we get a palindrome (32411000011423).

The spelling of 21210000010211 in words is "twenty-one trillion, two hundred ten billion, ten thousand, two hundred eleven".