21002330312 has 16 divisors (see below), whose sum is σ = 39383331840. Its totient is φ = 10500108496.

The previous prime is 21002330303. The next prime is 21002330347. The reversal of 21002330312 is 21303320012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44168 + ... + 209655.

It is an arithmetic number, because the mean of its divisors is an integer number (2461458240).

Almost surely, 2^21002330312 is an apocalyptic number.

It is an amenable number.

21002330312 is a deficient number, since it is larger than the sum of its proper divisors (18381001528).

21002330312 is a wasteful number, since it uses less digits than its factorization.

21002330312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264172 (or 264168 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21002330312 its reverse (21303320012), we get a palindrome (42305650324).

The spelling of 21002330312 in words is "twenty-one billion, two million, three hundred thirty thousand, three hundred twelve".