12109137260197 has 2 divisors, whose sum is σ = 12109137260198. Its totient is φ = 12109137260196.

The previous prime is 12109137260189. The next prime is 12109137260257. The reversal of 12109137260197 is 79106273190121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9696958632036 + 2412178628161 = 3113994^2 + 1553119^2 .

It is a cyclic number.

It is not a de Polignac number, because 12109137260197 - 2³ = 12109137260189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12109137260197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12109137260497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6054568630098 + 6054568630099.

It is an arithmetic number, because the mean of its divisors is an integer number (6054568630099).

Almost surely, 2^{12109137260197} is an apocalyptic number.

It is an amenable number.

12109137260197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12109137260197 is an equidigital number, since it uses as much as digits as its factorization.

12109137260197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 12109137260197 in words is "twelve trillion, one hundred nine billion, one hundred thirty-seven million, two hundred sixty thousand, one hundred ninety-seven".