43124123121 has 32 divisors (see below), whose sum is σ = 59569386240. Its totient is φ = 27730944000.

The previous prime is 43124123111. The next prime is 43124123201. The reversal of 43124123121 is 12132142134.

43124123121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43124123121 - 2¹⁵ = 43124090353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43124123091 and 43124123100.

It is not an unprimeable number, because it can be changed into a prime (43124123111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8979921 + ... + 8984721.

It is an arithmetic number, because the mean of its divisors is an integer number (1861543320).

Almost surely, 2^43124123121 is an apocalyptic number.

43124123121 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

43124123121 is a deficient number, since it is larger than the sum of its proper divisors (16445263119).

43124123121 is a wasteful number, since it uses less digits than its factorization.

43124123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5657.

The product of its digits is 1152, while the sum is 24.

Adding to 43124123121 its reverse (12132142134), we get a palindrome (55256265255).

The spelling of 43124123121 in words is "forty-three billion, one hundred twenty-four million, one hundred twenty-three thousand, one hundred twenty-one".