12111220012169 has 2 divisors, whose sum is σ = 12111220012170. Its totient is φ = 12111220012168.

The previous prime is 12111220012139. The next prime is 12111220012187. The reversal of 12111220012169 is 96121002211121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10215055210000 + 1896164802169 = 3196100^2 + 1377013^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111220012169 - 2¹⁶ = 12111219946633 is a prime.

It is a super-2 number, since 2×12111220012169² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12111220012139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055610006084 + 6055610006085.

It is an arithmetic number, because the mean of its divisors is an integer number (6055610006085).

Almost surely, 2^{12111220012169} is an apocalyptic number.

It is an amenable number.

12111220012169 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111220012169 is an equidigital number, since it uses as much as digits as its factorization.

12111220012169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 12111220012169 in words is "twelve trillion, one hundred eleven billion, two hundred twenty million, twelve thousand, one hundred sixty-nine".