12191731207 has 2 divisors, whose sum is σ = 12191731208. Its totient is φ = 12191731206.

The previous prime is 12191731193. The next prime is 12191731217. The reversal of 12191731207 is 70213719121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12191731207 - 2²³ = 12183342599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12191731217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6095865603 + 6095865604.

It is an arithmetic number, because the mean of its divisors is an integer number (6095865604).

Almost surely, 2^12191731207 is an apocalyptic number.

12191731207 is a deficient number, since it is larger than the sum of its proper divisors (1).

12191731207 is an equidigital number, since it uses as much as digits as its factorization.

12191731207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 34.

The spelling of 12191731207 in words is "twelve billion, one hundred ninety-one million, seven hundred thirty-one thousand, two hundred seven".