33012230221 has 2 divisors, whose sum is σ = 33012230222. Its totient is φ = 33012230220.

The previous prime is 33012230213. The next prime is 33012230231. The reversal of 33012230221 is 12203221033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32346022500 + 666207721 = 179850^2 + 25811^2 .

It is an emirp because it is prime and its reverse (12203221033) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33012230221 - 2³ = 33012230213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33012230231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16506115110 + 16506115111.

It is an arithmetic number, because the mean of its divisors is an integer number (16506115111).

Almost surely, 2^33012230221 is an apocalyptic number.

It is an amenable number.

33012230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33012230221 is an equidigital number, since it uses as much as digits as its factorization.

33012230221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 33012230221 its reverse (12203221033), we get a palindrome (45215451254).

The spelling of 33012230221 in words is "thirty-three billion, twelve million, two hundred thirty thousand, two hundred twenty-one".