4043444311021 has 4 divisors (see below), whose sum is σ = 4045662329472. Its totient is φ = 4041226292572.

The previous prime is 4043444311019. The next prime is 4043444311031. The reversal of 4043444311021 is 1201134443404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4043444311021 - 2¹ = 4043444311019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4043444311031) 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, 1109006491 + ... + 1109010136.

It is an arithmetic number, because the mean of its divisors is an integer number (1011415582368).

Almost surely, 2^{4043444311021} is an apocalyptic number.

It is an amenable number.

4043444311021 is a deficient number, since it is larger than the sum of its proper divisors (2218018451).

4043444311021 is a wasteful number, since it uses less digits than its factorization.

4043444311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218018450.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 4043444311021 its reverse (1201134443404), we get a palindrome (5244578754425).

The spelling of 4043444311021 in words is "four trillion, forty-three billion, four hundred forty-four million, three hundred eleven thousand, twenty-one".