12168478291 has 2 divisors, whose sum is σ = 12168478292. Its totient is φ = 12168478290.

The previous prime is 12168478277. The next prime is 12168478321. The reversal of 12168478291 is 19287486121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12168478291 - 2⁷ = 12168478163 is a prime.

It is not a weakly prime, because it can be changed into another prime (12168418291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6084239145 + 6084239146.

It is an arithmetic number, because the mean of its divisors is an integer number (6084239146).

Almost surely, 2^12168478291 is an apocalyptic number.

12168478291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12168478291 is an equidigital number, since it uses as much as digits as its factorization.

12168478291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 49.

The spelling of 12168478291 in words is "twelve billion, one hundred sixty-eight million, four hundred seventy-eight thousand, two hundred ninety-one".