21124044323312 has 20 divisors (see below), whose sum is σ = 46774669573296. Its totient is φ = 9053161852800.

The previous prime is 21124044323309. The next prime is 21124044323357. The reversal of 21124044323312 is 21332344042112.

It is a happy number.

It is a congruent number.

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, 94303769189 + ... + 94303769412.

Almost surely, 2^{21124044323312} is an apocalyptic number.

It is an amenable number.

21124044323312 is an abundant number, since it is smaller than the sum of its proper divisors (25650625249984).

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

21124044323312 is a wasteful number, since it uses less digits than its factorization.

21124044323312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188607538616 (or 188607538610 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21124044323312 its reverse (21332344042112), we get a palindrome (42456388365424).

The spelling of 21124044323312 in words is "twenty-one trillion, one hundred twenty-four billion, forty-four million, three hundred twenty-three thousand, three hundred twelve".