33132121021 has 4 divisors (see below), whose sum is σ = 33152587200. Its totient is φ = 33111654844.

The previous prime is 33132121013. The next prime is 33132121031. The reversal of 33132121021 is 12012123133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33132121021 - 2³ = 33132121013 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 33132121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33132121031) 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, 10230661 + ... + 10233898.

It is an arithmetic number, because the mean of its divisors is an integer number (8288146800).

Almost surely, 2^33132121021 is an apocalyptic number.

It is an amenable number.

33132121021 is a deficient number, since it is larger than the sum of its proper divisors (20466179).

33132121021 is a wasteful number, since it uses less digits than its factorization.

33132121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20466178.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 33132121021 its reverse (12012123133), we get a palindrome (45144244154).

The spelling of 33132121021 in words is "thirty-three billion, one hundred thirty-two million, one hundred twenty-one thousand, twenty-one".