21124212004312 has 64 divisors (see below), whose sum is σ = 43080317985600. Its totient is φ = 9671331164160.

The previous prime is 21124212004249. The next prime is 21124212004331. The reversal of 21124212004312 is 21340021242112.

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 15 ways as a sum of consecutive naturals, for example, 3274563 + ... + 7278130.

It is an arithmetic number, because the mean of its divisors is an integer number (673129968525).

Almost surely, 2^{21124212004312} is an apocalyptic number.

It is an amenable number.

21124212004312 is an abundant number, since it is smaller than the sum of its proper divisors (21956105981288).

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

21124212004312 is a wasteful number, since it uses less digits than its factorization.

21124212004312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10553116 (or 10553112 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21124212004312 its reverse (21340021242112), we get a palindrome (42464233246424).

The spelling of 21124212004312 in words is "twenty-one trillion, one hundred twenty-four billion, two hundred twelve million, four thousand, three hundred twelve".