12129699947 has 2 divisors, whose sum is σ = 12129699948. Its totient is φ = 12129699946.

The previous prime is 12129699893. The next prime is 12129699949. The reversal of 12129699947 is 74999692121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12129699947 - 2¹⁰ = 12129698923 is a prime.

Together with 12129699949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12129699949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064849973 + 6064849974.

It is an arithmetic number, because the mean of its divisors is an integer number (6064849974).

Almost surely, 2^12129699947 is an apocalyptic number.

12129699947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12129699947 is an equidigital number, since it uses as much as digits as its factorization.

12129699947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 59.

The spelling of 12129699947 in words is "twelve billion, one hundred twenty-nine million, six hundred ninety-nine thousand, nine hundred forty-seven".