21200021020211 has 24 divisors (see below), whose sum is σ = 24316489186080. Its totient is φ = 18434168248320.

The previous prime is 21200021020169. The next prime is 21200021020223. The reversal of 21200021020211 is 11202012000212.

It is not a de Polignac number, because 21200021020211 - 2²² = 21200016825907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200021020231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92863241 + ... + 93091253.

It is an arithmetic number, because the mean of its divisors is an integer number (1013187049420).

Almost surely, 2^{21200021020211} is an apocalyptic number.

21200021020211 is a deficient number, since it is larger than the sum of its proper divisors (3116468165869).

21200021020211 is a wasteful number, since it uses less digits than its factorization.

21200021020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261467 (or 261456 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21200021020211 its reverse (11202012000212), we get a palindrome (32402033020423).

The spelling of 21200021020211 in words is "twenty-one trillion, two hundred billion, twenty-one million, twenty thousand, two hundred eleven".