21200112331 has 4 divisors (see below), whose sum is σ = 21201460000. Its totient is φ = 21198764664.

The previous prime is 21200112223. The next prime is 21200112341. The reversal of 21200112331 is 13321100212.

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

It is a cyclic number.

It is not a de Polignac number, because 21200112331 - 2⁹ = 21200111819 is a prime.

It is a super-2 number, since 2×21200112331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200112341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649956 + ... + 681793.

It is an arithmetic number, because the mean of its divisors is an integer number (5300365000).

Almost surely, 2^21200112331 is an apocalyptic number.

21200112331 is a deficient number, since it is larger than the sum of its proper divisors (1347669).

21200112331 is a wasteful number, since it uses less digits than its factorization.

21200112331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347668.

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

Adding to 21200112331 its reverse (13321100212), we get a palindrome (34521212543).

The spelling of 21200112331 in words is "twenty-one billion, two hundred million, one hundred twelve thousand, three hundred thirty-one".