12181021112287 has 2 divisors, whose sum is σ = 12181021112288. Its totient is φ = 12181021112286.

The previous prime is 12181021112209. The next prime is 12181021112401. The reversal of 12181021112287 is 78221112018121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12181021112287 - 2⁷ = 12181021112159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12181021112587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6090510556143 + 6090510556144.

It is an arithmetic number, because the mean of its divisors is an integer number (6090510556144).

Almost surely, 2^{12181021112287} is an apocalyptic number.

12181021112287 is a deficient number, since it is larger than the sum of its proper divisors (1).

12181021112287 is an equidigital number, since it uses as much as digits as its factorization.

12181021112287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 37.

The spelling of 12181021112287 in words is "twelve trillion, one hundred eighty-one billion, twenty-one million, one hundred twelve thousand, two hundred eighty-seven".