121310915 has 32 divisors (see below), whose sum is σ = 172972800. Its totient is φ = 80680320.

The previous prime is 121310911. The next prime is 121310933. The reversal of 121310915 is 519013121.

It is not a de Polignac number, because 121310915 - 2² = 121310911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121310911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28304 + ... + 32306.

It is an arithmetic number, because the mean of its divisors is an integer number (5405400).

Almost surely, 2^121310915 is an apocalyptic number.

121310915 is a deficient number, since it is larger than the sum of its proper divisors (51661885).

121310915 is a wasteful number, since it uses less digits than its factorization.

121310915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 121310915 is about 11014.1234331199. The cubic root of 121310915 is about 495.0320218716.

The spelling of 121310915 in words is "one hundred twenty-one million, three hundred ten thousand, nine hundred fifteen".