21011200211 has 8 divisors (see below), whose sum is σ = 21543750144. Its totient is φ = 20482213000.

The previous prime is 21011200207. The next prime is 21011200213. The reversal of 21011200211 is 11200211012.

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

It is a cyclic number.

It is not a de Polignac number, because 21011200211 - 2² = 21011200207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21011200192 and 21011200201.

It is not an unprimeable number, because it can be changed into a prime (21011200213) 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, 878735 + ... + 902328.

It is an arithmetic number, because the mean of its divisors is an integer number (2692968768).

Almost surely, 2^21011200211 is an apocalyptic number.

21011200211 is a deficient number, since it is larger than the sum of its proper divisors (532549933).

21011200211 is a wasteful number, since it uses less digits than its factorization.

21011200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781361.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21011200211 its reverse (11200211012), we get a palindrome (32211411223).

The spelling of 21011200211 in words is "twenty-one billion, eleven million, two hundred thousand, two hundred eleven".