21210120000211 has 4 divisors (see below), whose sum is σ = 21316703518000. Its totient is φ = 21103536482424.

The previous prime is 21210120000161. The next prime is 21210120000233. The reversal of 21210120000211 is 11200002101212.

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 21210120000211 - 2⁹ = 21210119999699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210120000191 and 21210120000200.

It is not an unprimeable number, because it can be changed into a prime (21210120060211) 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, 53291758596 + ... + 53291758993.

It is an arithmetic number, because the mean of its divisors is an integer number (5329175879500).

Almost surely, 2^{21210120000211} is an apocalyptic number.

21210120000211 is a deficient number, since it is larger than the sum of its proper divisors (106583517789).

21210120000211 is a wasteful number, since it uses less digits than its factorization.

21210120000211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106583517788.

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

Adding to 21210120000211 its reverse (11200002101212), we get a palindrome (32410122101423).

The spelling of 21210120000211 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, two hundred eleven", and thus it is an aban number.