21200200121211 has 32 divisors (see below), whose sum is σ = 29564412134400. Its totient is φ = 13487586545664.

The previous prime is 21200200121117. The next prime is 21200200121213. The reversal of 21200200121211 is 11212100200212.

It is not a de Polignac number, because 21200200121211 - 2⁹ = 21200200120699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21200200121213) 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, 414097431 + ... + 414148623.

It is an arithmetic number, because the mean of its divisors is an integer number (923887879200).

Almost surely, 2^{21200200121211} is an apocalyptic number.

21200200121211 is a deficient number, since it is larger than the sum of its proper divisors (8364212013189).

21200200121211 is a wasteful number, since it uses less digits than its factorization.

21200200121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65035.

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

Adding to 21200200121211 its reverse (11212100200212), we get a palindrome (32412300321423).

The spelling of 21200200121211 in words is "twenty-one trillion, two hundred billion, two hundred million, one hundred twenty-one thousand, two hundred eleven".