43034431123121 has 4 divisors (see below), whose sum is σ = 43035290675700. Its totient is φ = 43033571570544.

The previous prime is 43034431123111. The next prime is 43034431123139. The reversal of 43034431123121 is 12132113443034.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39202174634896 + 3832256488225 = 6261164^2 + 1957615^2 .

It is a cyclic number.

It is not a de Polignac number, because 43034431123121 - 2³⁴ = 43017251253937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43034431123111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429701186 + ... + 429801323.

It is an arithmetic number, because the mean of its divisors is an integer number (10758822668925).

Almost surely, 2^{43034431123121} is an apocalyptic number.

It is an amenable number.

43034431123121 is a deficient number, since it is larger than the sum of its proper divisors (859552579).

43034431123121 is an equidigital number, since it uses as much as digits as its factorization.

43034431123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859552578.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 43034431123121 its reverse (12132113443034), we get a palindrome (55166544566155).

The spelling of 43034431123121 in words is "forty-three trillion, thirty-four billion, four hundred thirty-one million, one hundred twenty-three thousand, one hundred twenty-one".