12311333197 has 2 divisors, whose sum is σ = 12311333198. Its totient is φ = 12311333196.

The previous prime is 12311333191. The next prime is 12311333231. The reversal of 12311333197 is 79133311321.

It is an a-pointer prime, because the next prime (12311333231) can be obtained adding 12311333197 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11840486596 + 470846601 = 108814^2 + 21699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12311333197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12311333191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155666598 + 6155666599.

It is an arithmetic number, because the mean of its divisors is an integer number (6155666599).

Almost surely, 2^12311333197 is an apocalyptic number.

It is an amenable number.

12311333197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311333197 is an equidigital number, since it uses as much as digits as its factorization.

12311333197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 34.

The spelling of 12311333197 in words is "twelve billion, three hundred eleven million, three hundred thirty-three thousand, one hundred ninety-seven".