21124440213332 has 48 divisors (see below), whose sum is σ = 39817275624000. Its totient is φ = 9769599481344.

The previous prime is 21124440213311. The next prime is 21124440213367. The reversal of 21124440213332 is 23331204442112.

It is a happy number.

It is a super-2 number, since 2×21124440213332² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13158719 + ... + 14676537.

It is an arithmetic number, because the mean of its divisors is an integer number (829526575500).

Almost surely, 2^{21124440213332} is an apocalyptic number.

It is an amenable number.

21124440213332 is a deficient number, since it is larger than the sum of its proper divisors (18692835410668).

21124440213332 is a wasteful number, since it uses less digits than its factorization.

21124440213332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521368 (or 1521366 counting only the distinct ones).

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

Adding to 21124440213332 its reverse (23331204442112), we get a palindrome (44455644655444).

The spelling of 21124440213332 in words is "twenty-one trillion, one hundred twenty-four billion, four hundred forty million, two hundred thirteen thousand, three hundred thirty-two".