12440121144 has 64 divisors (see below), whose sum is σ = 35923357440. Its totient is φ = 3547983360.

The previous prime is 12440121143. The next prime is 12440121173. The reversal of 12440121144 is 44112104421.

It is a super-2 number, since 2×12440121144² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440121143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1381444 + ... + 1390419.

It is an arithmetic number, because the mean of its divisors is an integer number (561302460).

Almost surely, 2^12440121144 is an apocalyptic number.

It is an amenable number.

12440121144 is an abundant number, since it is smaller than the sum of its proper divisors (23483236296).

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

12440121144 is a wasteful number, since it uses less digits than its factorization.

12440121144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771900 (or 2771896 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 12440121144 its reverse (44112104421), we get a palindrome (56552225565).

The spelling of 12440121144 in words is "twelve billion, four hundred forty million, one hundred twenty-one thousand, one hundred forty-four".