12420151787 has 2 divisors, whose sum is σ = 12420151788. Its totient is φ = 12420151786.

The previous prime is 12420151759. The next prime is 12420151801. The reversal of 12420151787 is 78715102421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12420151787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12420151787.

It is not a weakly prime, because it can be changed into another prime (12420151187) 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, 6210075893 + 6210075894.

It is an arithmetic number, because the mean of its divisors is an integer number (6210075894).

Almost surely, 2^12420151787 is an apocalyptic number.

12420151787 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420151787 is an equidigital number, since it uses as much as digits as its factorization.

12420151787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 38.

The spelling of 12420151787 in words is "twelve billion, four hundred twenty million, one hundred fifty-one thousand, seven hundred eighty-seven".