33120230221 has 4 divisors (see below), whose sum is σ = 35667940252. Its totient is φ = 30572520192.

The previous prime is 33120230197. The next prime is 33120230233. The reversal of 33120230221 is 12203202133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8670216996 + 24450013225 = 93114^2 + 156365^2 .

It is a cyclic number.

It is not a de Polignac number, because 33120230221 - 2¹¹ = 33120228173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33120230321) 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, 1273854996 + ... + 1273855021.

It is an arithmetic number, because the mean of its divisors is an integer number (8916985063).

Almost surely, 2^33120230221 is an apocalyptic number.

It is an amenable number.

33120230221 is a deficient number, since it is larger than the sum of its proper divisors (2547710031).

33120230221 is a wasteful number, since it uses less digits than its factorization.

33120230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547710030.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 33120230221 its reverse (12203202133), we get a palindrome (45323432354).

The spelling of 33120230221 in words is "thirty-three billion, one hundred twenty million, two hundred thirty thousand, two hundred twenty-one".