21000200111 has 8 divisors (see below), whose sum is σ = 23028012624. Its totient is φ = 18992171520.

The previous prime is 21000200107. The next prime is 21000200153. The reversal of 21000200111 is 11100200012.

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 21000200111 - 2² = 21000200107 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 (21000200411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4943756 + ... + 4948001.

It is an arithmetic number, because the mean of its divisors is an integer number (2878501578).

Almost surely, 2^21000200111 is an apocalyptic number.

21000200111 is a deficient number, since it is larger than the sum of its proper divisors (2027812513).

21000200111 is a wasteful number, since it uses less digits than its factorization.

21000200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9891961.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21000200111 its reverse (11100200012), we get a palindrome (32100400123).

Subtracting from 21000200111 its reverse (11100200012), we obtain a palindrome (9900000099).

The spelling of 21000200111 in words is "twenty-one billion, two hundred thousand, one hundred eleven".