11431131197 has 2 divisors, whose sum is σ = 11431131198. Its totient is φ = 11431131196.

The previous prime is 11431131193. The next prime is 11431131227. The reversal of 11431131197 is 79113113411.

11431131197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8255357881 + 3175773316 = 90859^2 + 56354^2 .

It is a cyclic number.

It is not a de Polignac number, because 11431131197 - 2² = 11431131193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11431131193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5715565598 + 5715565599.

It is an arithmetic number, because the mean of its divisors is an integer number (5715565599).

Almost surely, 2^11431131197 is an apocalyptic number.

It is an amenable number.

11431131197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431131197 is an equidigital number, since it uses as much as digits as its factorization.

11431131197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 32.

The spelling of 11431131197 in words is "eleven billion, four hundred thirty-one million, one hundred thirty-one thousand, one hundred ninety-seven".