21200212211 has 8 divisors (see below), whose sum is σ = 22290833664. Its totient is φ = 20123663560.

The previous prime is 21200212199. The next prime is 21200212237. The reversal of 21200212211 is 11221200212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200212211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200212511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3515111 + ... + 3521136.

It is an arithmetic number, because the mean of its divisors is an integer number (2786354208).

Almost surely, 2^21200212211 is an apocalyptic number.

21200212211 is a deficient number, since it is larger than the sum of its proper divisors (1090621453).

21200212211 is a wasteful number, since it uses less digits than its factorization.

21200212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7036401.

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

Adding to 21200212211 its reverse (11221200212), we get a palindrome (32421412423).

The spelling of 21200212211 in words is "twenty-one billion, two hundred million, two hundred twelve thousand, two hundred eleven".