33042413221 has 2 divisors, whose sum is σ = 33042413222. Its totient is φ = 33042413220.

The previous prime is 33042413219. The next prime is 33042413231. The reversal of 33042413221 is 12231424033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30916188900 + 2126224321 = 175830^2 + 46111^2 .

It is a cyclic number.

It is not a de Polignac number, because 33042413221 - 2¹ = 33042413219 is a prime.

Together with 33042413219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33042413231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16521206610 + 16521206611.

It is an arithmetic number, because the mean of its divisors is an integer number (16521206611).

Almost surely, 2^33042413221 is an apocalyptic number.

It is an amenable number.

33042413221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33042413221 is an equidigital number, since it uses as much as digits as its factorization.

33042413221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 33042413221 its reverse (12231424033), we get a palindrome (45273837254).

The spelling of 33042413221 in words is "thirty-three billion, forty-two million, four hundred thirteen thousand, two hundred twenty-one".