33120332981 has 2 divisors, whose sum is σ = 33120332982. Its totient is φ = 33120332980.

The previous prime is 33120332969. The next prime is 33120332983. The reversal of 33120332981 is 18923302133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32073228100 + 1047104881 = 179090^2 + 32359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33120332981 is a prime.

It is a super-2 number, since 2×33120332981² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 33120332983, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33120332983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16560166490 + 16560166491.

It is an arithmetic number, because the mean of its divisors is an integer number (16560166491).

Almost surely, 2^33120332981 is an apocalyptic number.

It is an amenable number.

33120332981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33120332981 is an equidigital number, since it uses as much as digits as its factorization.

33120332981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 33120332981 in words is "thirty-three billion, one hundred twenty million, three hundred thirty-two thousand, nine hundred eighty-one".