21331243010 has 96 divisors (see below), whose sum is σ = 49050023040. Its totient is φ = 6604416000.

The previous prime is 21331242971. The next prime is 21331243039. The reversal of 21331243010 is 1034213312.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 800786 + ... + 826994.

It is an arithmetic number, because the mean of its divisors is an integer number (510937740).

Almost surely, 2^21331243010 is an apocalyptic number.

21331243010 is an abundant number, since it is smaller than the sum of its proper divisors (27718780030).

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

21331243010 is a wasteful number, since it uses less digits than its factorization.

21331243010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26392 (or 26385 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21331243010 its reverse (1034213312), we get a palindrome (22365456322).

The spelling of 21331243010 in words is "twenty-one billion, three hundred thirty-one million, two hundred forty-three thousand, ten".