12430021240 has 512 divisors, whose sum is σ = 38472537600. Its totient is φ = 3503554560.

The previous prime is 12430021229. The next prime is 12430021243. The reversal of 12430021240 is 4212003421.

It is a super-2 number, since 2×12430021240² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12430021243) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 139663116 + ... + 139663204.

It is an arithmetic number, because the mean of its divisors is an integer number (75141675).

Almost surely, 2^12430021240 is an apocalyptic number.

12430021240 is a gapful number since it is divisible by the number (10) 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 12430021240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19236268800).

12430021240 is an abundant number, since it is smaller than the sum of its proper divisors (26042516360).

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

12430021240 is a wasteful number, since it uses less digits than its factorization.

12430021240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 12430021240 its reverse (4212003421), we get a palindrome (16642024661).

The spelling of 12430021240 in words is "twelve billion, four hundred thirty million, twenty-one thousand, two hundred forty".