12421111019 has 2 divisors, whose sum is σ = 12421111020. Its totient is φ = 12421111018.

The previous prime is 12421110983. The next prime is 12421111037. The reversal of 12421111019 is 91011112421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12421111019 is a prime.

It is a super-2 number, since 2×12421111019² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 12421110985 and 12421111003.

It is not a weakly prime, because it can be changed into another prime (12421111069) 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, 6210555509 + 6210555510.

It is an arithmetic number, because the mean of its divisors is an integer number (6210555510).

Almost surely, 2^12421111019 is an apocalyptic number.

12421111019 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421111019 is an equidigital number, since it uses as much as digits as its factorization.

12421111019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 12421111019 in words is "twelve billion, four hundred twenty-one million, one hundred eleven thousand, nineteen".