33243233021 has 12 divisors (see below), whose sum is σ = 33619224756. Its totient is φ = 32871379200.

The previous prime is 33243232987. The next prime is 33243233027. The reversal of 33243233021 is 12033234233.

It can be written as a sum of positive squares in 6 ways, for example, as 6261556900 + 26981676121 = 79130^2 + 164261^2 .

It is not a de Polignac number, because 33243233021 - 2¹⁰ = 33243231997 is a prime.

It is a super-2 number, since 2×33243233021² (a number of 22 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 (33243233027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10332005 + ... + 10335221.

It is an arithmetic number, because the mean of its divisors is an integer number (2801602063).

Almost surely, 2^33243233021 is an apocalyptic number.

It is an amenable number.

33243233021 is a deficient number, since it is larger than the sum of its proper divisors (375991735).

33243233021 is a wasteful number, since it uses less digits than its factorization.

33243233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432 (or 4331 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 26.

Adding to 33243233021 its reverse (12033234233), we get a palindrome (45276467254).

The spelling of 33243233021 in words is "thirty-three billion, two hundred forty-three million, two hundred thirty-three thousand, twenty-one".