21200204331 has 16 divisors (see below), whose sum is σ = 33255223200. Its totient is φ = 13302088704.

The previous prime is 21200204239. The next prime is 21200204359. The reversal of 21200204331 is 13340200212.

21200204331 is a `hidden beast` number, since 212 + 0 + 0 + 20 + 433 + 1 = 666.

It is not a de Polignac number, because 21200204331 - 2¹⁷ = 21200073259 is a prime.

It is a super-2 number, since 2×21200204331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21200204371) 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 15 ways as a sum of consecutive naturals, for example, 23093446 + ... + 23094363.

It is an arithmetic number, because the mean of its divisors is an integer number (2078451450).

Almost surely, 2^21200204331 is an apocalyptic number.

21200204331 is a deficient number, since it is larger than the sum of its proper divisors (12055018869).

21200204331 is a wasteful number, since it uses less digits than its factorization.

21200204331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46187835 (or 46187829 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21200204331 its reverse (13340200212), we get a palindrome (34540404543).

The spelling of 21200204331 in words is "twenty-one billion, two hundred million, two hundred four thousand, three hundred thirty-one".