12242120440 has 128 divisors (see below), whose sum is σ = 31286761920. Its totient is φ = 4271616000.

The previous prime is 12242120411. The next prime is 12242120459. The reversal of 12242120440 is 4402124221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1183290 + ... + 1193590.

Almost surely, 2^12242120440 is an apocalyptic number.

12242120440 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 12242120440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15643380960).

12242120440 is an abundant number, since it is smaller than the sum of its proper divisors (19044641480).

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

12242120440 is a wasteful number, since it uses less digits than its factorization.

12242120440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10433 (or 10429 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 12242120440 its reverse (4402124221), we get a palindrome (16644244661).

The spelling of 12242120440 in words is "twelve billion, two hundred forty-two million, one hundred twenty thousand, four hundred forty".