21200323111 has 8 divisors (see below), whose sum is σ = 23472814464. Its totient is φ = 18985363320.

The previous prime is 21200323099. The next prime is 21200323187. The reversal of 21200323111 is 11132300212.

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

It is not a de Polignac number, because 21200323111 - 2¹¹ = 21200321063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200323811) 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, 14382115 + ... + 14383588.

It is an arithmetic number, because the mean of its divisors is an integer number (2934101808).

Almost surely, 2^21200323111 is an apocalyptic number.

21200323111 is a deficient number, since it is larger than the sum of its proper divisors (2272491353).

21200323111 is a wasteful number, since it uses less digits than its factorization.

21200323111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28765781.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21200323111 its reverse (11132300212), we get a palindrome (32332623323).

The spelling of 21200323111 in words is "twenty-one billion, two hundred million, three hundred twenty-three thousand, one hundred eleven".