33000120021221 has 4 divisors (see below), whose sum is σ = 33002459308032. Its totient is φ = 32997780734412.

The previous prime is 33000120021151. The next prime is 33000120021247. The reversal of 33000120021221 is 12212002100033.

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 33000120021221 - 2¹⁸ = 33000119759077 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 33000120021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33000120021721) 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, 1169622245 + ... + 1169650458.

It is an arithmetic number, because the mean of its divisors is an integer number (8250614827008).

Almost surely, 2^{33000120021221} is an apocalyptic number.

It is an amenable number.

33000120021221 is a deficient number, since it is larger than the sum of its proper divisors (2339286811).

33000120021221 is a wasteful number, since it uses less digits than its factorization.

33000120021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339286810.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 33000120021221 its reverse (12212002100033), we get a palindrome (45212122121254).

The spelling of 33000120021221 in words is "thirty-three trillion, one hundred twenty million, twenty-one thousand, two hundred twenty-one".