21200211200111 has 2 divisors, whose sum is σ = 21200211200112. Its totient is φ = 21200211200110.

The previous prime is 21200211200093. The next prime is 21200211200159. The reversal of 21200211200111 is 11100211200212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21200211200111 - 2³⁰ = 21199137458287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200211200171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600105600055 + 10600105600056.

It is an arithmetic number, because the mean of its divisors is an integer number (10600105600056).

Almost surely, 2^{21200211200111} is an apocalyptic number.

21200211200111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200211200111 is an equidigital number, since it uses as much as digits as its factorization.

21200211200111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21200211200111 its reverse (11100211200212), we get a palindrome (32300422400323).

The spelling of 21200211200111 in words is "twenty-one trillion, two hundred billion, two hundred eleven million, two hundred thousand, one hundred eleven".