121307855 has 16 divisors (see below), whose sum is σ = 148422240. Its totient is φ = 95158272.

The previous prime is 121307821. The next prime is 121307861. The reversal of 121307855 is 558703121.

It is a cyclic number.

It is not a de Polignac number, because 121307855 - 2¹² = 121303759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85391 + ... + 86799.

It is an arithmetic number, because the mean of its divisors is an integer number (9276390).

Almost surely, 2^121307855 is an apocalyptic number.

121307855 is a deficient number, since it is larger than the sum of its proper divisors (27114385).

121307855 is a wasteful number, since it uses less digits than its factorization.

121307855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 121307855 is about 11013.9845196913. The cubic root of 121307855 is about 495.0278595346.

The spelling of 121307855 in words is "one hundred twenty-one million, three hundred seven thousand, eight hundred fifty-five".