43224432121 has 4 divisors (see below), whose sum is σ = 46549388452. Its totient is φ = 39899475792.

The previous prime is 43224432103. The next prime is 43224432131. The reversal of 43224432121 is 12123442234.

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 7452005625 + 35772426496 = 86325^2 + 189136^2 .

It is a cyclic number.

It is not a de Polignac number, because 43224432121 - 2²⁹ = 42687561209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43224432121.

It is not an unprimeable number, because it can be changed into a prime (43224432131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662478146 + ... + 1662478171.

It is an arithmetic number, because the mean of its divisors is an integer number (11637347113).

Almost surely, 2^43224432121 is an apocalyptic number.

It is an amenable number.

43224432121 is a deficient number, since it is larger than the sum of its proper divisors (3324956331).

43224432121 is a wasteful number, since it uses less digits than its factorization.

43224432121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324956330.

The product of its digits is 9216, while the sum is 28.

Adding to 43224432121 its reverse (12123442234), we get a palindrome (55347874355).

The spelling of 43224432121 in words is "forty-three billion, two hundred twenty-four million, four hundred thirty-two thousand, one hundred twenty-one".