121255315 has 4 divisors (see below), whose sum is σ = 145506384. Its totient is φ = 97004248.

The previous prime is 121255301. The next prime is 121255319. The reversal of 121255315 is 513552121.

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 121255315 - 2⁷ = 121255187 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 121255315.

It is not an unprimeable number, because it can be changed into a prime (121255319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12125527 + ... + 12125536.

It is an arithmetic number, because the mean of its divisors is an integer number (36376596).

Almost surely, 2^121255315 is an apocalyptic number.

121255315 is a deficient number, since it is larger than the sum of its proper divisors (24251069).

121255315 is an equidigital number, since it uses as much as digits as its factorization.

121255315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24251068.

The product of its digits is 1500, while the sum is 25.

The square root of 121255315 is about 11011.5991118457. The cubic root of 121255315 is about 494.9563815594.

The spelling of 121255315 in words is "one hundred twenty-one million, two hundred fifty-five thousand, three hundred fifteen".