12002111161 has 2 divisors, whose sum is σ = 12002111162. Its totient is φ = 12002111160.

The previous prime is 12002111123. The next prime is 12002111189. The reversal of 12002111161 is 16111120021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11972517561 + 29593600 = 109419^2 + 5440^2 .

It is an emirp because it is prime and its reverse (16111120021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12002111161 is a prime.

It is not a weakly prime, because it can be changed into another prime (12002111761) 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, 6001055580 + 6001055581.

It is an arithmetic number, because the mean of its divisors is an integer number (6001055581).

Almost surely, 2^12002111161 is an apocalyptic number.

It is an amenable number.

12002111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002111161 is an equidigital number, since it uses as much as digits as its factorization.

12002111161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 12002111161 its reverse (16111120021), we get a palindrome (28113231182).

The spelling of 12002111161 in words is "twelve billion, two million, one hundred eleven thousand, one hundred sixty-one".