33043231021 has 2 divisors, whose sum is σ = 33043231022. Its totient is φ = 33043231020.

The previous prime is 33043230893. The next prime is 33043231027. The reversal of 33043231021 is 12013234033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32297121796 + 746109225 = 179714^2 + 27315^2 .

It is a cyclic number.

It is not a de Polignac number, because 33043231021 - 2⁷ = 33043230893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33043230983 and 33043231001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33043231027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16521615510 + 16521615511.

It is an arithmetic number, because the mean of its divisors is an integer number (16521615511).

Almost surely, 2^33043231021 is an apocalyptic number.

It is an amenable number.

33043231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33043231021 is an equidigital number, since it uses as much as digits as its factorization.

33043231021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 33043231021 its reverse (12013234033), we get a palindrome (45056465054).

The spelling of 33043231021 in words is "thirty-three billion, forty-three million, two hundred thirty-one thousand, twenty-one".