4033042021 has 4 divisors (see below), whose sum is σ = 4038342444. Its totient is φ = 4027741600.

The previous prime is 4033042001. The next prime is 4033042043. The reversal of 4033042021 is 1202403304.

4033042021 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 943349796 + 3089692225 = 30714^2 + 55585^2 .

It is a cyclic number.

It is not a de Polignac number, because 4033042021 - 2⁵ = 4033041989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4033042021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4033042001) 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, 2649070 + ... + 2650591.

It is an arithmetic number, because the mean of its divisors is an integer number (1009585611).

Almost surely, 2^4033042021 is an apocalyptic number.

It is an amenable number.

4033042021 is a deficient number, since it is larger than the sum of its proper divisors (5300423).

4033042021 is an equidigital number, since it uses as much as digits as its factorization.

4033042021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300422.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 4033042021 is about 63506.2360796166. The cubic root of 4033042021 is about 1591.7599831598.

Adding to 4033042021 its reverse (1202403304), we get a palindrome (5235445325).

The spelling of 4033042021 in words is "four billion, thirty-three million, forty-two thousand, twenty-one".