4044010021 has 2 divisors, whose sum is σ = 4044010022. Its totient is φ = 4044010020.

The previous prime is 4044009967. The next prime is 4044010039. The reversal of 4044010021 is 1200104404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3975302500 + 68707521 = 63050^2 + 8289^2 .

It is a cyclic number.

It is not a de Polignac number, because 4044010021 - 2¹¹ = 4044007973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4044009977 and 4044010004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4044011021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022005010 + 2022005011.

It is an arithmetic number, because the mean of its divisors is an integer number (2022005011).

Almost surely, 2^4044010021 is an apocalyptic number.

It is an amenable number.

4044010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4044010021 is an equidigital number, since it uses as much as digits as its factorization.

4044010021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 4044010021 is about 63592.5311730867. The cubic root of 4044010021 is about 1593.2016262179.

Adding to 4044010021 its reverse (1200104404), we get a palindrome (5244114425).

The spelling of 4044010021 in words is "four billion, forty-four million, ten thousand, twenty-one".