4002044332021 has 8 divisors (see below), whose sum is σ = 4019589262040. Its totient is φ = 3984521683968.

The previous prime is 4002044331977. The next prime is 4002044332037. The reversal of 4002044332021 is 1202334402004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 935255331396 + 3066789000625 = 967086^2 + 1751225^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4002044332021 - 2⁷ = 4002044331893 is a prime.

It is a super-2 number, since 2×4002044332021² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002044332051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5210436 + ... + 5928973.

It is an arithmetic number, because the mean of its divisors is an integer number (502448657755).

Almost surely, 2^{4002044332021} is an apocalyptic number.

It is an amenable number.

4002044332021 is a deficient number, since it is larger than the sum of its proper divisors (17544930019).

4002044332021 is a wasteful number, since it uses less digits than its factorization.

4002044332021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11140983.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 4002044332021 its reverse (1202334402004), we get a palindrome (5204378734025).

The spelling of 4002044332021 in words is "four trillion, two billion, forty-four million, three hundred thirty-two thousand, twenty-one".