12012012391 has 2 divisors, whose sum is σ = 12012012392. Its totient is φ = 12012012390.

The previous prime is 12012012377. The next prime is 12012012409. The reversal of 12012012391 is 19321021021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12012012391 - 2²⁹ = 11475141479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012012191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006006195 + 6006006196.

It is an arithmetic number, because the mean of its divisors is an integer number (6006006196).

Almost surely, 2^12012012391 is an apocalyptic number.

12012012391 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012012391 is an equidigital number, since it uses as much as digits as its factorization.

12012012391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 12012012391 in words is "twelve billion, twelve million, twelve thousand, three hundred ninety-one".