21120031330 has 32 divisors (see below), whose sum is σ = 38570359680. Its totient is φ = 8324951040.

The previous prime is 21120031217. The next prime is 21120031333. The reversal of 21120031330 is 3313002112.

It is not an unprimeable number, because it can be changed into a prime (21120031333) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1739842 + ... + 1751938.

It is an arithmetic number, because the mean of its divisors is an integer number (1205323740).

Almost surely, 2^21120031330 is an apocalyptic number.

21120031330 is a deficient number, since it is larger than the sum of its proper divisors (17450328350).

21120031330 is a wasteful number, since it uses less digits than its factorization.

21120031330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14634.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21120031330 its reverse (3313002112), we get a palindrome (24433033442).

The spelling of 21120031330 in words is "twenty-one billion, one hundred twenty million, thirty-one thousand, three hundred thirty".