12121201212191 has 2 divisors, whose sum is σ = 12121201212192. Its totient is φ = 12121201212190.

The previous prime is 12121201212181. The next prime is 12121201212259. The reversal of 12121201212191 is 19121210212121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12121201212191 - 2²² = 12121197017887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12121201212191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121201212101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060600606095 + 6060600606096.

It is an arithmetic number, because the mean of its divisors is an integer number (6060600606096).

Almost surely, 2^{12121201212191} is an apocalyptic number.

12121201212191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121201212191 is an equidigital number, since it uses as much as digits as its factorization.

12121201212191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 12121201212191 in words is "twelve trillion, one hundred twenty-one billion, two hundred one million, two hundred twelve thousand, one hundred ninety-one".