21200111100011 has 4 divisors (see below), whose sum is σ = 21468466936800. Its totient is φ = 20931755263224.

The previous prime is 21200111100001. The next prime is 21200111100029. The reversal of 21200111100011 is 11000111100212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200111100011 is a prime.

It is a super-3 number, since 3×21200111100011³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200111099965 and 21200111100001.

It is not an unprimeable number, because it can be changed into a prime (21200111100001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134177918276 + ... + 134177918433.

It is an arithmetic number, because the mean of its divisors is an integer number (5367116734200).

Almost surely, 2^{21200111100011} is an apocalyptic number.

21200111100011 is a deficient number, since it is larger than the sum of its proper divisors (268355836789).

21200111100011 is an equidigital number, since it uses as much as digits as its factorization.

21200111100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268355836788.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21200111100011 its reverse (11000111100212), we get a palindrome (32200222200223).

The spelling of 21200111100011 in words is "twenty-one trillion, two hundred billion, one hundred eleven million, one hundred thousand, eleven".