121201121191 has 2 divisors, whose sum is σ = 121201121192. Its totient is φ = 121201121190.

The previous prime is 121201121147. The next prime is 121201121221. The reversal of 121201121191 is 191121102121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121201121191 - 2²⁹ = 120664250279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121201421191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600560595 + 60600560596.

It is an arithmetic number, because the mean of its divisors is an integer number (60600560596).

Almost surely, 2^121201121191 is an apocalyptic number.

121201121191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201121191 is an equidigital number, since it uses as much as digits as its factorization.

121201121191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

It can be divided in two parts, 12120 and 1121191, that added together give a palindrome (1133311).

The spelling of 121201121191 in words is "one hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, one hundred ninety-one".