12440123412 has 24 divisors (see below), whose sum is σ = 29030803200. Its totient is φ = 4146158016.

The previous prime is 12440123411. The next prime is 12440123431. The reversal of 12440123412 is 21432104421.

12440123412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440123411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31389 + ... + 160827.

It is an arithmetic number, because the mean of its divisors is an integer number (1209616800).

Almost surely, 2^12440123412 is an apocalyptic number.

12440123412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12440123412 is an abundant number, since it is smaller than the sum of its proper divisors (16590679788).

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

12440123412 is a wasteful number, since it uses less digits than its factorization.

12440123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137455 (or 137453 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 12440123412 its reverse (21432104421), we get a palindrome (33872227833).

The spelling of 12440123412 in words is "twelve billion, four hundred forty million, one hundred twenty-three thousand, four hundred twelve".