21333033012 has 48 divisors (see below), whose sum is σ = 51534201600. Its totient is φ = 6860380800.

The previous prime is 21333032977. The next prime is 21333033019. The reversal of 21333033012 is 21033033312.

It is a self number, because there is not a number n which added to its sum of digits gives 21333033012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333033019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429189 + ... + 476307.

It is an arithmetic number, because the mean of its divisors is an integer number (1073629200).

Almost surely, 2^21333033012 is an apocalyptic number.

It is an amenable number.

21333033012 is an abundant number, since it is smaller than the sum of its proper divisors (30201168588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21333033012 is a wasteful number, since it uses less digits than its factorization.

21333033012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48456 (or 48454 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21333033012 its reverse (21033033312), we get a palindrome (42366066324).

The spelling of 21333033012 in words is "twenty-one billion, three hundred thirty-three million, thirty-three thousand, twelve".