21033130012 has 24 divisors (see below), whose sum is σ = 37248471792. Its totient is φ = 10391136000.

The previous prime is 21033130009. The next prime is 21033130021. The reversal of 21033130012 is 21003133012.

It is a congruent number.

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, 145348 + ... + 251380.

It is an arithmetic number, because the mean of its divisors is an integer number (1552019658).

Almost surely, 2^21033130012 is an apocalyptic number.

It is an amenable number.

21033130012 is a deficient number, since it is larger than the sum of its proper divisors (16215341780).

21033130012 is a wasteful number, since it uses less digits than its factorization.

21033130012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106629 (or 106627 counting only the distinct ones).

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

Adding to 21033130012 its reverse (21003133012), we get a palindrome (42036263024).

The spelling of 21033130012 in words is "twenty-one billion, thirty-three million, one hundred thirty thousand, twelve".