121001121191 has 2 divisors, whose sum is σ = 121001121192. Its totient is φ = 121001121190.

The previous prime is 121001121169. The next prime is 121001121223. The reversal of 121001121191 is 191121100121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121001121191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121001121491) 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, 60500560595 + 60500560596.

It is an arithmetic number, because the mean of its divisors is an integer number (60500560596).

Almost surely, 2^121001121191 is an apocalyptic number.

121001121191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001121191 is an equidigital number, since it uses as much as digits as its factorization.

121001121191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 121001121191 in words is "one hundred twenty-one billion, one million, one hundred twenty-one thousand, one hundred ninety-one".