21033330312 has 32 divisors (see below), whose sum is σ = 52887286080. Its totient is φ = 6970582080.

The previous prime is 21033330299. The next prime is 21033330347. The reversal of 21033330312 is 21303333012.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2528764 + ... + 2537067.

It is an arithmetic number, because the mean of its divisors is an integer number (1652727690).

Almost surely, 2^21033330312 is an apocalyptic number.

It is an amenable number.

21033330312 is an abundant number, since it is smaller than the sum of its proper divisors (31853955768).

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

21033330312 is a wasteful number, since it uses less digits than its factorization.

21033330312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5066013 (or 5066009 counting only the distinct ones).

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

Adding to 21033330312 its reverse (21303333012), we get a palindrome (42336663324).

The spelling of 21033330312 in words is "twenty-one billion, thirty-three million, three hundred thirty thousand, three hundred twelve".