21111120200211 has 16 divisors (see below), whose sum is σ = 28230675379200. Its totient is φ = 14032826591648.

The previous prime is 21111120200207. The next prime is 21111120200227. The reversal of 21111120200211 is 11200202111112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21111120200211 - 2² = 21111120200207 is a prime.

It is a super-2 number, since 2×21111120200211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21111120200201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20993905 + ... + 21976493.

It is an arithmetic number, because the mean of its divisors is an integer number (1764417211200).

Almost surely, 2^{21111120200211} is an apocalyptic number.

21111120200211 is a deficient number, since it is larger than the sum of its proper divisors (7119555178989).

21111120200211 is a wasteful number, since it uses less digits than its factorization.

21111120200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003578.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21111120200211 its reverse (11200202111112), we get a palindrome (32311322311323).

The spelling of 21111120200211 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty million, two hundred thousand, two hundred eleven".