21233123324 has 12 divisors (see below), whose sum is σ = 42466246704. Its totient is φ = 9099909984.

The previous prime is 21233123321. The next prime is 21233123339. The reversal of 21233123324 is 42332133212.

It is a happy number.

21233123324 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21233123293 and 21233123302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233123321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379162889 + ... + 379162944.

It is an arithmetic number, because the mean of its divisors is an integer number (3538853892).

Almost surely, 2^21233123324 is an apocalyptic number.

It is an amenable number.

21233123324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21233123324 is a wasteful number, since it uses less digits than its factorization.

21233123324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758325844 (or 758325842 counting only the distinct ones).

The product of its digits is 5184, while the sum is 26.

Adding to 21233123324 its reverse (42332133212), we get a palindrome (63565256536).

The spelling of 21233123324 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-three thousand, three hundred twenty-four".