121225115 has 16 divisors (see below), whose sum is σ = 160185600. Its totient is φ = 87335520.

The previous prime is 121225099. The next prime is 121225121. The reversal of 121225115 is 511522121.

It is not a de Polignac number, because 121225115 - 2⁴ = 121225099 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4415 + ... + 16184.

It is an arithmetic number, because the mean of its divisors is an integer number (10011600).

Almost surely, 2^121225115 is an apocalyptic number.

121225115 is a deficient number, since it is larger than the sum of its proper divisors (38960485).

121225115 is a wasteful number, since it uses less digits than its factorization.

121225115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20722.

The product of its digits is 200, while the sum is 20.

The square root of 121225115 is about 11010.2277451468. The cubic root of 121225115 is about 494.9152866629.

Adding to 121225115 its reverse (511522121), we get a palindrome (632747236).

The spelling of 121225115 in words is "one hundred twenty-one million, two hundred twenty-five thousand, one hundred fifteen".