121148191 has 2 divisors, whose sum is σ = 121148192. Its totient is φ = 121148190.

The previous prime is 121148189. The next prime is 121148197. The reversal of 121148191 is 191841121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121148191 - 2¹ = 121148189 is a prime.

Together with 121148189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121148197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60574095 + 60574096.

It is an arithmetic number, because the mean of its divisors is an integer number (60574096).

Almost surely, 2^121148191 is an apocalyptic number.

121148191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121148191 is an equidigital number, since it uses as much as digits as its factorization.

121148191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 28.

The square root of 121148191 is about 11006.7338933945. The cubic root of 121148191 is about 494.8105808599.

The spelling of 121148191 in words is "one hundred twenty-one million, one hundred forty-eight thousand, one hundred ninety-one".