21211210200211 has 4 divisors (see below), whose sum is σ = 21328399207024. Its totient is φ = 21094021193400.

The previous prime is 21211210200181. The next prime is 21211210200227. The reversal of 21211210200211 is 11200201211212.

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-21211210200211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211210201211) 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, 58594503135 + ... + 58594503496.

It is an arithmetic number, because the mean of its divisors is an integer number (5332099801756).

Almost surely, 2^{21211210200211} is an apocalyptic number.

21211210200211 is a deficient number, since it is larger than the sum of its proper divisors (117189006813).

21211210200211 is a wasteful number, since it uses less digits than its factorization.

21211210200211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117189006812.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211210200211 its reverse (11200201211212), we get a palindrome (32411411411423).

The spelling of 21211210200211 in words is "twenty-one trillion, two hundred eleven billion, two hundred ten million, two hundred thousand, two hundred eleven".