12185220797 has 2 divisors, whose sum is σ = 12185220798. Its totient is φ = 12185220796.

The previous prime is 12185220731. The next prime is 12185220829. The reversal of 12185220797 is 79702258121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6465928921 + 5719291876 = 80411^2 + 75626^2 .

It is an emirp because it is prime and its reverse (79702258121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12185220797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12185220097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6092610398 + 6092610399.

It is an arithmetic number, because the mean of its divisors is an integer number (6092610399).

Almost surely, 2^12185220797 is an apocalyptic number.

It is an amenable number.

12185220797 is a deficient number, since it is larger than the sum of its proper divisors (1).

12185220797 is an equidigital number, since it uses as much as digits as its factorization.

12185220797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 12185220797 in words is "twelve billion, one hundred eighty-five million, two hundred twenty thousand, seven hundred ninety-seven".