21200102211 has 4 divisors (see below), whose sum is σ = 28266802952. Its totient is φ = 14133401472.

The previous prime is 21200102191. The next prime is 21200102227. The reversal of 21200102211 is 11220100212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21200102211 - 2¹⁷ = 21199971139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200102281) 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, 3533350366 + ... + 3533350371.

It is an arithmetic number, because the mean of its divisors is an integer number (7066700738).

Almost surely, 2^21200102211 is an apocalyptic number.

21200102211 is a deficient number, since it is larger than the sum of its proper divisors (7066700741).

21200102211 is an equidigital number, since it uses as much as digits as its factorization.

21200102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7066700740.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21200102211 its reverse (11220100212), we get a palindrome (32420202423).

The spelling of 21200102211 in words is "twenty-one billion, two hundred million, one hundred two thousand, two hundred eleven".