12103320440 has 32 divisors (see below), whose sum is σ = 27412832160. Its totient is φ = 4809264000.

The previous prime is 12103320389. The next prime is 12103320443. The reversal of 12103320440 is 4402330121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103320443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995891 + ... + 1007970.

It is an arithmetic number, because the mean of its divisors is an integer number (856651005).

Almost surely, 2^12103320440 is an apocalyptic number.

12103320440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12103320440 is an abundant number, since it is smaller than the sum of its proper divisors (15309511720).

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

12103320440 is a wasteful number, since it uses less digits than its factorization.

12103320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004023 (or 2004019 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12103320440 its reverse (4402330121), we get a palindrome (16505650561).

The spelling of 12103320440 in words is "twelve billion, one hundred three million, three hundred twenty thousand, four hundred forty".