12169255121 has 2 divisors, whose sum is σ = 12169255122. Its totient is φ = 12169255120.

The previous prime is 12169255079. The next prime is 12169255151. The reversal of 12169255121 is 12155296121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12167193025 + 2062096 = 110305^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 12169255121 - 2⁶ = 12169255057 is a prime.

It is not a weakly prime, because it can be changed into another prime (12169255151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6084627560 + 6084627561.

It is an arithmetic number, because the mean of its divisors is an integer number (6084627561).

Almost surely, 2^12169255121 is an apocalyptic number.

It is an amenable number.

12169255121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12169255121 is an equidigital number, since it uses as much as digits as its factorization.

12169255121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 35.

The spelling of 12169255121 in words is "twelve billion, one hundred sixty-nine million, two hundred fifty-five thousand, one hundred twenty-one".