121043191 has 2 divisors, whose sum is σ = 121043192. Its totient is φ = 121043190.

The previous prime is 121043159. The next prime is 121043239. The reversal of 121043191 is 191340121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121043191 - 2⁵ = 121043159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121043491) 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, 60521595 + 60521596.

It is an arithmetic number, because the mean of its divisors is an integer number (60521596).

Almost surely, 2^121043191 is an apocalyptic number.

121043191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121043191 is an equidigital number, since it uses as much as digits as its factorization.

121043191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 121043191 is about 11001.9630521103. The cubic root of 121043191 is about 494.6675875893.

The spelling of 121043191 in words is "one hundred twenty-one million, forty-three thousand, one hundred ninety-one".