33044042021 has 2 divisors, whose sum is σ = 33044042022. Its totient is φ = 33044042020.

The previous prime is 33044042011. The next prime is 33044042039. The reversal of 33044042021 is 12024044033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32347821025 + 696220996 = 179855^2 + 26386^2 .

It is a cyclic number.

It is not a de Polignac number, because 33044042021 - 2²² = 33039847717 is a prime.

It is a super-2 number, since 2×33044042021² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33044042011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16522021010 + 16522021011.

It is an arithmetic number, because the mean of its divisors is an integer number (16522021011).

Almost surely, 2^33044042021 is an apocalyptic number.

It is an amenable number.

33044042021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33044042021 is an equidigital number, since it uses as much as digits as its factorization.

33044042021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 33044042021 its reverse (12024044033), we get a palindrome (45068086054).

The spelling of 33044042021 in words is "thirty-three billion, forty-four million, forty-two thousand, twenty-one".