12012012191 has 2 divisors, whose sum is σ = 12012012192. Its totient is φ = 12012012190.

The previous prime is 12012012163. The next prime is 12012012217. The reversal of 12012012191 is 19121021021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012012191 is a prime.

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 (12012012151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006006095 + 6006006096.

It is an arithmetic number, because the mean of its divisors is an integer number (6006006096).

Almost surely, 2^12012012191 is an apocalyptic number.

12012012191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012012191 is an equidigital number, since it uses as much as digits as its factorization.

12012012191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 12012012191 in words is "twelve billion, twelve million, twelve thousand, one hundred ninety-one".