12433121544 has 64 divisors (see below), whose sum is σ = 32156208000. Its totient is φ = 4002891264.

The previous prime is 12433121543. The next prime is 12433121557. The reversal of 12433121544 is 44512133421.

It is a super-2 number, since 2×12433121544² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12433121543) 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, 70557 + ... + 172755.

It is an arithmetic number, because the mean of its divisors is an integer number (502440750).

Almost surely, 2^12433121544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12433121544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16078104000).

12433121544 is an abundant number, since it is smaller than the sum of its proper divisors (19723086456).

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

12433121544 is a wasteful number, since it uses less digits than its factorization.

12433121544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102382 (or 102378 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

Adding to 12433121544 its reverse (44512133421), we get a palindrome (56945254965).

The spelling of 12433121544 in words is "twelve billion, four hundred thirty-three million, one hundred twenty-one thousand, five hundred forty-four".