12345111787 has 2 divisors, whose sum is σ = 12345111788. Its totient is φ = 12345111786.

The previous prime is 12345111773. The next prime is 12345111809. The reversal of 12345111787 is 78711154321.

It is a weak prime.

It is an emirp because it is prime and its reverse (78711154321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12345111787 - 2¹¹ = 12345109739 is a prime.

It is not a weakly prime, because it can be changed into another prime (12345111487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172555893 + 6172555894.

It is an arithmetic number, because the mean of its divisors is an integer number (6172555894).

Almost surely, 2^12345111787 is an apocalyptic number.

12345111787 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345111787 is an equidigital number, since it uses as much as digits as its factorization.

12345111787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 40.

The spelling of 12345111787 in words is "twelve billion, three hundred forty-five million, one hundred eleven thousand, seven hundred eighty-seven".