43440201121 has 4 divisors (see below), whose sum is σ = 43440645700. Its totient is φ = 43439756544.

The previous prime is 43440201107. The next prime is 43440201139. The reversal of 43440201121 is 12110204434.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7471182096 + 35969019025 = 86436^2 + 189655^2 .

It is a cyclic number.

It is not a de Polignac number, because 43440201121 - 2⁵ = 43440201089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43440201092 and 43440201101.

It is not an unprimeable number, because it can be changed into a prime (43440201151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4776 + ... + 294793.

It is an arithmetic number, because the mean of its divisors is an integer number (10860161425).

Almost surely, 2^43440201121 is an apocalyptic number.

It is an amenable number.

43440201121 is a deficient number, since it is larger than the sum of its proper divisors (444579).

43440201121 is a wasteful number, since it uses less digits than its factorization.

43440201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444578.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 43440201121 its reverse (12110204434), we get a palindrome (55550405555).

The spelling of 43440201121 in words is "forty-three billion, four hundred forty million, two hundred one thousand, one hundred twenty-one".