33011321081 has 2 divisors, whose sum is σ = 33011321082. Its totient is φ = 33011321080.

The previous prime is 33011321059. The next prime is 33011321111. The reversal of 33011321081 is 18012311033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28541061481 + 4470259600 = 168941^2 + 66860^2 .

It is a cyclic number.

It is not a de Polignac number, because 33011321081 - 2¹⁰ = 33011320057 is a prime.

It is a super-2 number, since 2×33011321081² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (33011327081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16505660540 + 16505660541.

It is an arithmetic number, because the mean of its divisors is an integer number (16505660541).

Almost surely, 2^33011321081 is an apocalyptic number.

It is an amenable number.

33011321081 is a deficient number, since it is larger than the sum of its proper divisors (1).

33011321081 is an equidigital number, since it uses as much as digits as its factorization.

33011321081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 33011321081 in words is "thirty-three billion, eleven million, three hundred twenty-one thousand, eighty-one".