12122201111161 has 2 divisors, whose sum is σ = 12122201111162. Its totient is φ = 12122201111160.

The previous prime is 12122201111087. The next prime is 12122201111177. The reversal of 12122201111161 is 16111110222121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12084105488400 + 38095622761 = 3476220^2 + 195181^2 .

It is an emirp because it is prime and its reverse (16111110222121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12122201111161 is a prime.

It is not a weakly prime, because it can be changed into another prime (12122201114161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061100555580 + 6061100555581.

It is an arithmetic number, because the mean of its divisors is an integer number (6061100555581).

Almost surely, 2^{12122201111161} is an apocalyptic number.

It is an amenable number.

12122201111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122201111161 is an equidigital number, since it uses as much as digits as its factorization.

12122201111161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 22.

Adding to 12122201111161 its reverse (16111110222121), we get a palindrome (28233311333282).

The spelling of 12122201111161 in words is "twelve trillion, one hundred twenty-two billion, two hundred one million, one hundred eleven thousand, one hundred sixty-one".