120812191 has 2 divisors, whose sum is σ = 120812192. Its totient is φ = 120812190.

The previous prime is 120812129. The next prime is 120812201. The reversal of 120812191 is 191218021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120812191 - 2⁹ = 120811679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120812101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60406095 + 60406096.

It is an arithmetic number, because the mean of its divisors is an integer number (60406096).

Almost surely, 2^120812191 is an apocalyptic number.

120812191 is a deficient number, since it is larger than the sum of its proper divisors (1).

120812191 is an equidigital number, since it uses as much as digits as its factorization.

120812191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 120812191 is about 10991.4599121318. The cubic root of 120812191 is about 494.3527110587.

The spelling of 120812191 in words is "one hundred twenty million, eight hundred twelve thousand, one hundred ninety-one".