21000200011111 has 8 divisors (see below), whose sum is σ = 21512462497344. Its totient is φ = 20487940500480.

The previous prime is 21000200011097. The next prime is 21000200011121. The reversal of 21000200011111 is 11111000200012.

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 21000200011111 - 2¹⁷ = 21000199880039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000200011121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21707911 + ... + 22654663.

It is an arithmetic number, because the mean of its divisors is an integer number (2689057812168).

Almost surely, 2^{21000200011111} is an apocalyptic number.

21000200011111 is a deficient number, since it is larger than the sum of its proper divisors (512262486233).

21000200011111 is an equidigital number, since it uses as much as digits as its factorization.

21000200011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487801.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21000200011111 its reverse (11111000200012), we get a palindrome (32111200211123).

The spelling of 21000200011111 in words is "twenty-one trillion, two hundred million, eleven thousand, one hundred eleven".