21101011200211 has 4 divisors (see below), whose sum is σ = 21222982363392. Its totient is φ = 20979040037032.

The previous prime is 21101011200193. The next prime is 21101011200223. The reversal of 21101011200211 is 11200211010112.

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 21101011200211 - 2⁹ = 21101011199699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101011200191 and 21101011200200.

It is not an unprimeable number, because it can be changed into a prime (21101011200251) 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, 60985581331 + ... + 60985581676.

It is an arithmetic number, because the mean of its divisors is an integer number (5305745590848).

Almost surely, 2^{21101011200211} is an apocalyptic number.

21101011200211 is a deficient number, since it is larger than the sum of its proper divisors (121971163181).

21101011200211 is a wasteful number, since it uses less digits than its factorization.

21101011200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121971163180.

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

Adding to 21101011200211 its reverse (11200211010112), we get a palindrome (32301222210323).

The spelling of 21101011200211 in words is "twenty-one trillion, one hundred one billion, eleven million, two hundred thousand, two hundred eleven".