21210001110211 has 4 divisors (see below), whose sum is σ = 21211754449672. Its totient is φ = 21208247770752.

The previous prime is 21210001110173. The next prime is 21210001110281. The reversal of 21210001110211 is 11201110001212.

It is a happy number.

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 21210001110211 - 2⁷ = 21210001110083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210001110191 and 21210001110200.

It is not an unprimeable number, because it can be changed into a prime (21210001110281) 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, 876651585 + ... + 876675778.

It is an arithmetic number, because the mean of its divisors is an integer number (5302938612418).

Almost surely, 2^{21210001110211} is an apocalyptic number.

21210001110211 is a deficient number, since it is larger than the sum of its proper divisors (1753339461).

21210001110211 is a wasteful number, since it uses less digits than its factorization.

21210001110211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753339460.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21210001110211 its reverse (11201110001212), we get a palindrome (32411111111423).

The spelling of 21210001110211 in words is "twenty-one trillion, two hundred ten billion, one million, one hundred ten thousand, two hundred eleven".