21325605125612 has 24 divisors (see below), whose sum is σ = 37966352189472. Its totient is φ = 10479035548800.

The previous prime is 21325605125569. The next prime is 21325605125677. The reversal of 21325605125612 is 21652150652312.

It is a self number, because there is not a number n which added to its sum of digits gives 21325605125612.

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, 119863439 + ... + 120041222.

It is an arithmetic number, because the mean of its divisors is an integer number (1581931341228).

Almost surely, 2^{21325605125612} is an apocalyptic number.

It is an amenable number.

21325605125612 is a deficient number, since it is larger than the sum of its proper divisors (16640747063860).

21325605125612 is a wasteful number, since it uses less digits than its factorization.

21325605125612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239905049 (or 239905047 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

Adding to 21325605125612 its reverse (21652150652312), we get a palindrome (42977755777924).

The spelling of 21325605125612 in words is "twenty-one trillion, three hundred twenty-five billion, six hundred five million, one hundred twenty-five thousand, six hundred twelve".