121385191 has 8 divisors (see below), whose sum is σ = 127895040. Its totient is φ = 114978072.

The previous prime is 121385189. The next prime is 121385207. The reversal of 121385191 is 191583121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121385191 - 2¹ = 121385189 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121385171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23251 + ... + 27988.

It is an arithmetic number, because the mean of its divisors is an integer number (15986880).

Almost surely, 2^121385191 is an apocalyptic number.

121385191 is a deficient number, since it is larger than the sum of its proper divisors (6509849).

121385191 is a wasteful number, since it uses less digits than its factorization.

121385191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51365.

The product of its digits is 2160, while the sum is 31.

The square root of 121385191 is about 11017.4947696834. The cubic root of 121385191 is about 495.1330336580.

The spelling of 121385191 in words is "one hundred twenty-one million, three hundred eighty-five thousand, one hundred ninety-one".