33866782121 has 2 divisors, whose sum is σ = 33866782122. Its totient is φ = 33866782120.

The previous prime is 33866782043. The next prime is 33866782127. The reversal of 33866782121 is 12128766833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22345765225 + 11521016896 = 149485^2 + 107336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33866782121 is a prime.

It is a super-2 number, since 2×33866782121² (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 (33866782127) 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, 16933391060 + 16933391061.

It is an arithmetic number, because the mean of its divisors is an integer number (16933391061).

Almost surely, 2^33866782121 is an apocalyptic number.

It is an amenable number.

33866782121 is a deficient number, since it is larger than the sum of its proper divisors (1).

33866782121 is an equidigital number, since it uses as much as digits as its factorization.

33866782121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The spelling of 33866782121 in words is "thirty-three billion, eight hundred sixty-six million, seven hundred eighty-two thousand, one hundred twenty-one".