12145694117 has 2 divisors, whose sum is σ = 12145694118. Its totient is φ = 12145694116.

The previous prime is 12145694059. The next prime is 12145694123. The reversal of 12145694117 is 71149654121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11245754116 + 899940001 = 106046^2 + 29999^2 .

It is a cyclic number.

It is not a de Polignac number, because 12145694117 - 2⁶ = 12145694053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12145694137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6072847058 + 6072847059.

It is an arithmetic number, because the mean of its divisors is an integer number (6072847059).

Almost surely, 2^12145694117 is an apocalyptic number.

It is an amenable number.

12145694117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12145694117 is an equidigital number, since it uses as much as digits as its factorization.

12145694117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The spelling of 12145694117 in words is "twelve billion, one hundred forty-five million, six hundred ninety-four thousand, one hundred seventeen".