12420442500 has 240 divisors, whose sum is σ = 39026507520. Its totient is φ = 3063312000.

The previous prime is 12420442499. The next prime is 12420442511. The reversal of 12420442500 is 524402421.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6126487 + ... + 6128513.

It is an arithmetic number, because the mean of its divisors is an integer number (162610448).

Almost surely, 2^12420442500 is an apocalyptic number.

12420442500 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 12420442500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19513253760).

12420442500 is an abundant number, since it is smaller than the sum of its proper divisors (26606065020).

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

12420442500 is a wasteful number, since it uses less digits than its factorization.

12420442500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116 (or 2099 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 12420442500 its reverse (524402421), we get a palindrome (12944844921).

The spelling of 12420442500 in words is "twelve billion, four hundred twenty million, four hundred forty-two thousand, five hundred".