21002343334512 has 40 divisors (see below), whose sum is σ = 54271095939456. Its totient is φ = 6998840166336.

The previous prime is 21002343334481. The next prime is 21002343334523. The reversal of 21002343334512 is 21543334320012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60479598 + ... + 60825869.

Almost surely, 2^{21002343334512} is an apocalyptic number.

It is an amenable number.

21002343334512 is an abundant number, since it is smaller than the sum of its proper divisors (33268752604944).

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

21002343334512 is a wasteful number, since it uses less digits than its factorization.

21002343334512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121309085 (or 121309079 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 21002343334512 its reverse (21543334320012), we get a palindrome (42545677654524).

The spelling of 21002343334512 in words is "twenty-one trillion, two billion, three hundred forty-three million, three hundred thirty-four thousand, five hundred twelve".