12421011887 has 2 divisors, whose sum is σ = 12421011888. Its totient is φ = 12421011886.

The previous prime is 12421011877. The next prime is 12421011917. The reversal of 12421011887 is 78811012421.

It is a weak prime.

It is an emirp because it is prime and its reverse (78811012421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12421011887 - 2³⁰ = 11347270063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12421011817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210505943 + 6210505944.

It is an arithmetic number, because the mean of its divisors is an integer number (6210505944).

Almost surely, 2^12421011887 is an apocalyptic number.

12421011887 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421011887 is an equidigital number, since it uses as much as digits as its factorization.

12421011887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 35.

The spelling of 12421011887 in words is "twelve billion, four hundred twenty-one million, eleven thousand, eight hundred eighty-seven".