21201022010211 has 4 divisors (see below), whose sum is σ = 28268029346952. Its totient is φ = 14134014673472.

The previous prime is 21201022010171. The next prime is 21201022010279. The reversal of 21201022010211 is 11201022010212.

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 21201022010211 - 2⁷ = 21201022010083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21201022010291) 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, 3533503668366 + ... + 3533503668371.

It is an arithmetic number, because the mean of its divisors is an integer number (7067007336738).

Almost surely, 2^{21201022010211} is an apocalyptic number.

21201022010211 is a deficient number, since it is larger than the sum of its proper divisors (7067007336741).

21201022010211 is an equidigital number, since it uses as much as digits as its factorization.

21201022010211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067007336740.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21201022010211 its reverse (11201022010212), we get a palindrome (32402044020423).

Subtracting from 21201022010211 its reverse (11201022010212), we obtain a palindrome (9999999999999).

The spelling of 21201022010211 in words is "twenty-one trillion, two hundred one billion, twenty-two million, ten thousand, two hundred eleven".