12111000110161 has 2 divisors, whose sum is σ = 12111000110162. Its totient is φ = 12111000110160.

The previous prime is 12111000110101. The next prime is 12111000110171. The reversal of 12111000110161 is 16101100011121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9121420788561 + 2989579321600 = 3020169^2 + 1729040^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111000110161 - 2¹⁹ = 12110999585873 is a prime.

It is not a weakly prime, because it can be changed into another prime (12111000110101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055500055080 + 6055500055081.

It is an arithmetic number, because the mean of its divisors is an integer number (6055500055081).

Almost surely, 2^{12111000110161} is an apocalyptic number.

It is an amenable number.

12111000110161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111000110161 is an equidigital number, since it uses as much as digits as its factorization.

12111000110161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 12111000110161 its reverse (16101100011121), we get a palindrome (28212100121282).

The spelling of 12111000110161 in words is "twelve trillion, one hundred eleven billion, one hundred ten thousand, one hundred sixty-one".