33107243621 has 2 divisors, whose sum is σ = 33107243622. Its totient is φ = 33107243620.

The previous prime is 33107243597. The next prime is 33107243669. The reversal of 33107243621 is 12634270133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27206853025 + 5900390596 = 164945^2 + 76814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33107243621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33107245621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16553621810 + 16553621811.

It is an arithmetic number, because the mean of its divisors is an integer number (16553621811).

Almost surely, 2^33107243621 is an apocalyptic number.

It is an amenable number.

33107243621 is a deficient number, since it is larger than the sum of its proper divisors (1).

33107243621 is an equidigital number, since it uses as much as digits as its factorization.

33107243621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 32.

The spelling of 33107243621 in words is "thirty-three billion, one hundred seven million, two hundred forty-three thousand, six hundred twenty-one".