21231430230324 has 192 divisors, whose sum is σ = 53682244116480. Its totient is φ = 6514006625280.

The previous prime is 21231430230253. The next prime is 21231430230331. The reversal of 21231430230324 is 42303203413212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21231430230291 and 21231430230300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2578816512 + ... + 2578824744.

It is an arithmetic number, because the mean of its divisors is an integer number (279595021440).

Almost surely, 2^{21231430230324} 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 21231430230324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26841122058240).

21231430230324 is an abundant number, since it is smaller than the sum of its proper divisors (32450813886156).

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

21231430230324 is a wasteful number, since it uses less digits than its factorization.

21231430230324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11630 (or 11628 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 21231430230324 its reverse (42303203413212), we get a palindrome (63534633643536).

The spelling of 21231430230324 in words is "twenty-one trillion, two hundred thirty-one billion, four hundred thirty million, two hundred thirty thousand, three hundred twenty-four".