121216195 has 4 divisors (see below), whose sum is σ = 145459440. Its totient is φ = 96972952.

The previous prime is 121216189. The next prime is 121216217. The reversal of 121216195 is 591612121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121216195 - 2⁹ = 121215683 is a prime.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12121615 + ... + 12121624.

It is an arithmetic number, because the mean of its divisors is an integer number (36364860).

Almost surely, 2^121216195 is an apocalyptic number.

121216195 is a deficient number, since it is larger than the sum of its proper divisors (24243245).

121216195 is an equidigital number, since it uses as much as digits as its factorization.

121216195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24243244.

The product of its digits is 1080, while the sum is 28.

The square root of 121216195 is about 11009.8226597888. The cubic root of 121216195 is about 494.9031473944.

The spelling of 121216195 in words is "one hundred twenty-one million, two hundred sixteen thousand, one hundred ninety-five".