21100330330 has 16 divisors (see below), whose sum is σ = 37987373160. Its totient is φ = 8438625792.

The previous prime is 21100330297. The next prime is 21100330367. The reversal of 21100330330 is 3303300112.

It can be written as a sum of positive squares in 4 ways, for example, as 20192694201 + 907636129 = 142101^2 + 30127^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128559 + ... + 242338.

Almost surely, 2^21100330330 is an apocalyptic number.

21100330330 is a deficient number, since it is larger than the sum of its proper divisors (16887042830).

21100330330 is a wasteful number, since it uses less digits than its factorization.

21100330330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376593.

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 21100330330 its reverse (3303300112), we get a palindrome (24403630442).

The spelling of 21100330330 in words is "twenty-one billion, one hundred million, three hundred thirty thousand, three hundred thirty".