13112122109 has 2 divisors, whose sum is σ = 13112122110. Its totient is φ = 13112122108.

The previous prime is 13112122073. The next prime is 13112122157. The reversal of 13112122109 is 90122121131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12498569209 + 613552900 = 111797^2 + 24770^2 .

It is a cyclic number.

It is not a de Polignac number, because 13112122109 - 2⁸ = 13112121853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13112122169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6556061054 + 6556061055.

It is an arithmetic number, because the mean of its divisors is an integer number (6556061055).

Almost surely, 2^13112122109 is an apocalyptic number.

It is an amenable number.

13112122109 is a deficient number, since it is larger than the sum of its proper divisors (1).

13112122109 is an equidigital number, since it uses as much as digits as its factorization.

13112122109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 13112122109 in words is "thirteen billion, one hundred twelve million, one hundred twenty-two thousand, one hundred nine".