21040120324204 has 12 divisors (see below), whose sum is σ = 37718264483928. Its totient is φ = 10263473328800.

The previous prime is 21040120324193. The next prime is 21040120324229. The reversal of 21040120324204 is 40242302104012.

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, 64146708142 + ... + 64146708469.

It is an arithmetic number, because the mean of its divisors is an integer number (3143188706994).

Almost surely, 2^{21040120324204} is an apocalyptic number.

It is an amenable number.

21040120324204 is a deficient number, since it is larger than the sum of its proper divisors (16678144159724).

21040120324204 is a wasteful number, since it uses less digits than its factorization.

21040120324204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128293416656 (or 128293416654 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21040120324204 its reverse (40242302104012), we get a palindrome (61282422428216).

The spelling of 21040120324204 in words is "twenty-one trillion, forty billion, one hundred twenty million, three hundred twenty-four thousand, two hundred four".