4044134440021 has 4 divisors (see below), whose sum is σ = 4355221704652. Its totient is φ = 3733047175392.

The previous prime is 4044134439869. The next prime is 4044134440039. The reversal of 4044134440021 is 1200444314404.

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 1342759500625 + 2701374939396 = 1158775^2 + 1643586^2 .

It is a cyclic number.

It is not a de Polignac number, because 4044134440021 - 2⁹ = 4044134439509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4044134440051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155543632296 + ... + 155543632321.

It is an arithmetic number, because the mean of its divisors is an integer number (1088805426163).

Almost surely, 2^{4044134440021} is an apocalyptic number.

It is an amenable number.

4044134440021 is a deficient number, since it is larger than the sum of its proper divisors (311087264631).

4044134440021 is a wasteful number, since it uses less digits than its factorization.

4044134440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311087264630.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 4044134440021 its reverse (1200444314404), we get a palindrome (5244578754425).

The spelling of 4044134440021 in words is "four trillion, forty-four billion, one hundred thirty-four million, four hundred forty thousand, twenty-one".