21200324111 has 6 divisors (see below), whose sum is σ = 21956579112. Its totient is φ = 20469277640.

The previous prime is 21200324077. The next prime is 21200324141. The reversal of 21200324111 is 11142300212.

It is not a de Polignac number, because 21200324111 - 2²⁶ = 21133215247 is a prime.

It is a super-2 number, since 2×21200324111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21200324111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200324141) 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 5 ways as a sum of consecutive naturals, for example, 12603395 + ... + 12605076.

It is an arithmetic number, because the mean of its divisors is an integer number (3659429852).

Almost surely, 2^21200324111 is an apocalyptic number.

21200324111 is a deficient number, since it is larger than the sum of its proper divisors (756255001).

21200324111 is an equidigital number, since it uses as much as digits as its factorization.

21200324111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25208529 (or 25208500 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21200324111 its reverse (11142300212), we get a palindrome (32342624323).

The spelling of 21200324111 in words is "twenty-one billion, two hundred million, three hundred twenty-four thousand, one hundred eleven".