12011022111161 has 2 divisors, whose sum is σ = 12011022111162. Its totient is φ = 12011022111160.

The previous prime is 12011022111113. The next prime is 12011022111173. The reversal of 12011022111161 is 16111122011021.

12011022111161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11700264919225 + 310757191936 = 3420565^2 + 557456^2 .

It is an emirp because it is prime and its reverse (16111122011021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12011022111161 - 2⁶ = 12011022111097 is a prime.

It is not a weakly prime, because it can be changed into another prime (12011022116161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005511055580 + 6005511055581.

It is an arithmetic number, because the mean of its divisors is an integer number (6005511055581).

Almost surely, 2^{12011022111161} is an apocalyptic number.

It is an amenable number.

12011022111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011022111161 is an equidigital number, since it uses as much as digits as its factorization.

12011022111161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 20.

Adding to 12011022111161 its reverse (16111122011021), we get a palindrome (28122144122182).

The spelling of 12011022111161 in words is "twelve trillion, eleven billion, twenty-two million, one hundred eleven thousand, one hundred sixty-one".