121548191 has 2 divisors, whose sum is σ = 121548192. Its totient is φ = 121548190.

The previous prime is 121548131. The next prime is 121548209. The reversal of 121548191 is 191845121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121548191 - 2⁶ = 121548127 is a prime.

It is a super-3 number, since 3×121548191³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121548121) 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, 60774095 + 60774096.

It is an arithmetic number, because the mean of its divisors is an integer number (60774096).

Almost surely, 2^121548191 is an apocalyptic number.

121548191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121548191 is an equidigital number, since it uses as much as digits as its factorization.

121548191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 32.

The square root of 121548191 is about 11024.8896139599. The cubic root of 121548191 is about 495.3545614670.

The spelling of 121548191 in words is "one hundred twenty-one million, five hundred forty-eight thousand, one hundred ninety-one".