12424122440 has 64 divisors (see below), whose sum is σ = 29007538560. Its totient is φ = 4785661440.

The previous prime is 12424122407. The next prime is 12424122443. The reversal of 12424122440 is 4422142421.

It is a happy number.

It is a super-2 number, since 2×12424122440² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12424122443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71252 + ... + 172988.

It is an arithmetic number, because the mean of its divisors is an integer number (453242790).

Almost surely, 2^12424122440 is an apocalyptic number.

12424122440 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 12424122440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14503769280).

12424122440 is an abundant number, since it is smaller than the sum of its proper divisors (16583416120).

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

12424122440 is a wasteful number, since it uses less digits than its factorization.

12424122440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101862 (or 101858 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 12424122440 its reverse (4422142421), we get a palindrome (16846264861).

The spelling of 12424122440 in words is "twelve billion, four hundred twenty-four million, one hundred twenty-two thousand, four hundred forty".