21201100120211 has 32 divisors (see below), whose sum is σ = 24667336332288. Its totient is φ = 18008110563840.

The previous prime is 21201100120199. The next prime is 21201100120303. The reversal of 21201100120211 is 11202100110212.

It is a cyclic number.

It is not a de Polignac number, because 21201100120211 - 2³⁴ = 21183920251027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201100120111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26335286 + ... + 27128388.

It is an arithmetic number, because the mean of its divisors is an integer number (770854260384).

Almost surely, 2^{21201100120211} is an apocalyptic number.

21201100120211 is a deficient number, since it is larger than the sum of its proper divisors (3466236212077).

21201100120211 is a wasteful number, since it uses less digits than its factorization.

21201100120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794171.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21201100120211 its reverse (11202100110212), we get a palindrome (32403200230423).

Subtracting from 21201100120211 its reverse (11202100110212), we obtain a palindrome (9999000009999).

The spelling of 21201100120211 in words is "twenty-one trillion, two hundred one billion, one hundred million, one hundred twenty thousand, two hundred eleven".