12091720276667 has 2 divisors, whose sum is σ = 12091720276668. Its totient is φ = 12091720276666.

The previous prime is 12091720276613. The next prime is 12091720276679. The reversal of 12091720276667 is 76667202719021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12091720276667 - 2⁸ = 12091720276411 is a prime.

It is not a weakly prime, because it can be changed into another prime (12091720276697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6045860138333 + 6045860138334.

It is an arithmetic number, because the mean of its divisors is an integer number (6045860138334).

Almost surely, 2^{12091720276667} is an apocalyptic number.

12091720276667 is a deficient number, since it is larger than the sum of its proper divisors (1).

12091720276667 is an equidigital number, since it uses as much as digits as its factorization.

12091720276667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 12091720276667 in words is "twelve trillion, ninety-one billion, seven hundred twenty million, two hundred seventy-six thousand, six hundred sixty-seven".