12511218719 has 2 divisors, whose sum is σ = 12511218720. Its totient is φ = 12511218718.

The previous prime is 12511218673. The next prime is 12511218763. The reversal of 12511218719 is 91781211521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12511218719 - 2¹² = 12511214623 is a prime.

It is a super-2 number, since 2×12511218719² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12511218919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6255609359 + 6255609360.

It is an arithmetic number, because the mean of its divisors is an integer number (6255609360).

Almost surely, 2^12511218719 is an apocalyptic number.

12511218719 is a deficient number, since it is larger than the sum of its proper divisors (1).

12511218719 is an equidigital number, since it uses as much as digits as its factorization.

12511218719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 38.

The spelling of 12511218719 in words is "twelve billion, five hundred eleven million, two hundred eighteen thousand, seven hundred nineteen".