21200111101 has 8 divisors (see below), whose sum is σ = 22832270720. Its totient is φ = 19568148912.

The previous prime is 21200111089. The next prime is 21200111131. The reversal of 21200111101 is 10111100212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21200111101 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 (21200111131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233920 + ... + 311638.

It is an arithmetic number, because the mean of its divisors is an integer number (2854033840).

Almost surely, 2^21200111101 is an apocalyptic number.

It is an amenable number.

21200111101 is a deficient number, since it is larger than the sum of its proper divisors (1632159619).

21200111101 is a wasteful number, since it uses less digits than its factorization.

21200111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98715.

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

Adding to 21200111101 its reverse (10111100212), we get a palindrome (31311211313).

It can be divided in two parts, 21200111 and 101, that added together give a palindrome (21200212).

The spelling of 21200111101 in words is "twenty-one billion, two hundred million, one hundred eleven thousand, one hundred one".