21321040310024 has 128 divisors (see below), whose sum is σ = 50016023769600. Its totient is φ = 8295257917440.

The previous prime is 21321040310021. The next prime is 21321040310027. The reversal of 21321040310024 is 42001304012312.

It is an interprime number because it is at equal distance from previous prime (21321040310021) and next prime (21321040310027).

It is not an unprimeable number, because it can be changed into a prime (21321040310021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359097812 + ... + 359157180.

It is an arithmetic number, because the mean of its divisors is an integer number (390750185700).

Almost surely, 2^{21321040310024} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21321040310024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25008011884800).

21321040310024 is an abundant number, since it is smaller than the sum of its proper divisors (28694983459576).

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

21321040310024 is a wasteful number, since it uses less digits than its factorization.

21321040310024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67543 (or 67539 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21321040310024 its reverse (42001304012312), we get a palindrome (63322344322336).

The spelling of 21321040310024 in words is "twenty-one trillion, three hundred twenty-one billion, forty million, three hundred ten thousand, twenty-four".