21200311232 has 28 divisors (see below), whose sum is σ = 42351731400. Its totient is φ = 10529008896.

The previous prime is 21200311229. The next prime is 21200311241. The reversal of 21200311232 is 23211300212.

It is a self number, because there is not a number n which added to its sum of digits gives 21200311232.

It is a congruent number.

It is an unprimeable number.

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, 1102058 + ... + 1121129.

Almost surely, 2^21200311232 is an apocalyptic number.

It is an amenable number.

21200311232 is a deficient number, since it is larger than the sum of its proper divisors (21151420168).

21200311232 is a wasteful number, since it uses less digits than its factorization.

21200311232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223348 (or 2223338 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21200311232 its reverse (23211300212), we get a palindrome (44411611444).

The spelling of 21200311232 in words is "twenty-one billion, two hundred million, three hundred eleven thousand, two hundred thirty-two".