21001324002 has 16 divisors (see below), whose sum is σ = 42004616160. Its totient is φ = 7000113312.

The previous prime is 21001323997. The next prime is 21001324013. The reversal of 21001324002 is 20042310012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81918 + ... + 220710.

It is an arithmetic number, because the mean of its divisors is an integer number (2625288510).

Almost surely, 2^21001324002 is an apocalyptic number.

21001324002 is an abundant number, since it is smaller than the sum of its proper divisors (21003292158).

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

21001324002 is a wasteful number, since it uses less digits than its factorization.

21001324002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164017.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21001324002 its reverse (20042310012), we get a palindrome (41043634014).

The spelling of 21001324002 in words is "twenty-one billion, one million, three hundred twenty-four thousand, two".