21200220332 has 12 divisors (see below), whose sum is σ = 37238307120. Its totient is φ = 10560704016.

The previous prime is 21200220319. The next prime is 21200220337. The reversal of 21200220332 is 23302200212.

It is a self number, because there is not a number n which added to its sum of digits gives 21200220332.

It is not an unprimeable number, because it can be changed into a prime (21200220337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9850328 + ... + 9852479.

It is an arithmetic number, because the mean of its divisors is an integer number (3103192260).

Almost surely, 2^21200220332 is an apocalyptic number.

It is an amenable number.

21200220332 is a deficient number, since it is larger than the sum of its proper divisors (16038086788).

21200220332 is a wasteful number, since it uses less digits than its factorization.

21200220332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19703080 (or 19703078 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21200220332 its reverse (23302200212), we get a palindrome (44502420544).

The spelling of 21200220332 in words is "twenty-one billion, two hundred million, two hundred twenty thousand, three hundred thirty-two".