33394243121 has 2 divisors, whose sum is σ = 33394243122. Its totient is φ = 33394243120.

The previous prime is 33394243093. The next prime is 33394243123. The reversal of 33394243121 is 12134249333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32048160400 + 1346082721 = 179020^2 + 36689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33394243121 is a prime.

It is a super-2 number, since 2×33394243121² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 33394243123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (33394243123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16697121560 + 16697121561.

It is an arithmetic number, because the mean of its divisors is an integer number (16697121561).

Almost surely, 2^33394243121 is an apocalyptic number.

It is an amenable number.

33394243121 is a deficient number, since it is larger than the sum of its proper divisors (1).

33394243121 is an equidigital number, since it uses as much as digits as its factorization.

33394243121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 35.

The spelling of 33394243121 in words is "thirty-three billion, three hundred ninety-four million, two hundred forty-three thousand, one hundred twenty-one".