43121124424 has 128 divisors (see below), whose sum is σ = 95389747200. Its totient is φ = 17895144960.

The previous prime is 43121124407. The next prime is 43121124469. The reversal of 43121124424 is 42442112134.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 43121124392 and 43121124401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87822819 + ... + 87823309.

It is an arithmetic number, because the mean of its divisors is an integer number (745232400).

Almost surely, 2^43121124424 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 43121124424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47694873600).

43121124424 is an abundant number, since it is smaller than the sum of its proper divisors (52268622776).

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

43121124424 is a wasteful number, since it uses less digits than its factorization.

43121124424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 919 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

Adding to 43121124424 its reverse (42442112134), we get a palindrome (85563236558).

The spelling of 43121124424 in words is "forty-three billion, one hundred twenty-one million, one hundred twenty-four thousand, four hundred twenty-four".