21200332031 has 16 divisors (see below), whose sum is σ = 22537046400. Its totient is φ = 19885976928.

The previous prime is 21200332009. The next prime is 21200332033. The reversal of 21200332031 is 13023300212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200332031 is a prime.

It is a super-2 number, since 2×21200332031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200332033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3863816 + ... + 3869298.

It is an arithmetic number, because the mean of its divisors is an integer number (1408565400).

Almost surely, 2^21200332031 is an apocalyptic number.

21200332031 is a deficient number, since it is larger than the sum of its proper divisors (1336714369).

21200332031 is a wasteful number, since it uses less digits than its factorization.

21200332031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7478.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21200332031 its reverse (13023300212), we get a palindrome (34223632243).

The spelling of 21200332031 in words is "twenty-one billion, two hundred million, three hundred thirty-two thousand, thirty-one".