67161000121 has 2 divisors, whose sum is σ = 67161000122. Its totient is φ = 67161000120.

The previous prime is 67161000119. The next prime is 67161000133. The reversal of 67161000121 is 12100016176.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60634137600 + 6526862521 = 246240^2 + 80789^2 .

It is a cyclic number.

It is not a de Polignac number, because 67161000121 - 2¹ = 67161000119 is a prime.

Together with 67161000119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (67161000161) 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, 33580500060 + 33580500061.

It is an arithmetic number, because the mean of its divisors is an integer number (33580500061).

Almost surely, 2^67161000121 is an apocalyptic number.

It is an amenable number.

67161000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

67161000121 is an equidigital number, since it uses as much as digits as its factorization.

67161000121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 67161000121 its reverse (12100016176), we get a palindrome (79261016297).

The spelling of 67161000121 in words is "sixty-seven billion, one hundred sixty-one million, one hundred twenty-one", and thus it is an aban number.