12381722497 has 2 divisors, whose sum is σ = 12381722498. Its totient is φ = 12381722496.

The previous prime is 12381722467. The next prime is 12381722539. The reversal of 12381722497 is 79422718321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7554391056 + 4827331441 = 86916^2 + 69479^2 .

It is an emirp because it is prime and its reverse (79422718321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12381722497 is a prime.

It is not a weakly prime, because it can be changed into another prime (12381722467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6190861248 + 6190861249.

It is an arithmetic number, because the mean of its divisors is an integer number (6190861249).

Almost surely, 2^12381722497 is an apocalyptic number.

It is an amenable number.

12381722497 is a deficient number, since it is larger than the sum of its proper divisors (1).

12381722497 is an equidigital number, since it uses as much as digits as its factorization.

12381722497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The spelling of 12381722497 in words is "twelve billion, three hundred eighty-one million, seven hundred twenty-two thousand, four hundred ninety-seven".