12321742387 has 2 divisors, whose sum is σ = 12321742388. Its totient is φ = 12321742386.

The previous prime is 12321742379. The next prime is 12321742399. The reversal of 12321742387 is 78324712321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12321742387 - 2³ = 12321742379 is a prime.

It is not a weakly prime, because it can be changed into another prime (12321742187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160871193 + 6160871194.

It is an arithmetic number, because the mean of its divisors is an integer number (6160871194).

Almost surely, 2^12321742387 is an apocalyptic number.

12321742387 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321742387 is an equidigital number, since it uses as much as digits as its factorization.

12321742387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 40.

The spelling of 12321742387 in words is "twelve billion, three hundred twenty-one million, seven hundred forty-two thousand, three hundred eighty-seven".