121380775 has 12 divisors (see below), whose sum is σ = 157056912. Its totient is φ = 92882240.

The previous prime is 121380773. The next prime is 121380811. The reversal of 121380775 is 577083121.

It is not a de Polignac number, because 121380775 - 2¹ = 121380773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121380775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121380773) 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 in 11 ways as a sum of consecutive naturals, for example, 104974 + ... + 106123.

It is an arithmetic number, because the mean of its divisors is an integer number (13088076).

Almost surely, 2^121380775 is an apocalyptic number.

121380775 is a deficient number, since it is larger than the sum of its proper divisors (35676137).

121380775 is a wasteful number, since it uses less digits than its factorization.

121380775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211130 (or 211125 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 121380775 is about 11017.2943593243. The cubic root of 121380775 is about 495.1270292628.

The spelling of 121380775 in words is "one hundred twenty-one million, three hundred eighty thousand, seven hundred seventy-five".