21343331124320 has 96 divisors (see below), whose sum is σ = 51228617233248. Its totient is φ = 8401297563648.

The previous prime is 21343331124317. The next prime is 21343331124343. The reversal of 21343331124320 is 2342113334312.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9454514 + ... + 11492366.

It is an arithmetic number, because the mean of its divisors is an integer number (533631429513).

Almost surely, 2^{21343331124320} is an apocalyptic number.

21343331124320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21343331124320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25614308616624).

21343331124320 is an abundant number, since it is smaller than the sum of its proper divisors (29885286108928).

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

21343331124320 is a wasteful number, since it uses less digits than its factorization.

21343331124320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038912 (or 2038904 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 21343331124320 its reverse (2342113334312), we get a palindrome (23685444458632).

The spelling of 21343331124320 in words is "twenty-one trillion, three hundred forty-three billion, three hundred thirty-one million, one hundred twenty-four thousand, three hundred twenty".