121560612191 has 2 divisors, whose sum is σ = 121560612192. Its totient is φ = 121560612190.

The previous prime is 121560612169. The next prime is 121560612209. The reversal of 121560612191 is 191216065121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121560612191 - 2¹⁰ = 121560611167 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 (121560612101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60780306095 + 60780306096.

It is an arithmetic number, because the mean of its divisors is an integer number (60780306096).

Almost surely, 2^121560612191 is an apocalyptic number.

121560612191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121560612191 is an equidigital number, since it uses as much as digits as its factorization.

121560612191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 35.

The spelling of 121560612191 in words is "one hundred twenty-one billion, five hundred sixty million, six hundred twelve thousand, one hundred ninety-one".