121112515 has 8 divisors (see below), whose sum is σ = 145633968. Its totient is φ = 96690720.

The previous prime is 121112501. The next prime is 121112531. The reversal of 121112515 is 515211121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121112515 - 2¹³ = 121104323 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 121112492 and 121112501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22212 + ... + 27121.

It is an arithmetic number, because the mean of its divisors is an integer number (18204246).

Almost surely, 2^121112515 is an apocalyptic number.

121112515 is a deficient number, since it is larger than the sum of its proper divisors (24521453).

121112515 is an equidigital number, since it uses as much as digits as its factorization.

121112515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49829.

The product of its digits is 100, while the sum is 19.

The square root of 121112515 is about 11005.1131298138. The cubic root of 121112515 is about 494.7620051025.

Adding to 121112515 its reverse (515211121), we get a palindrome (636323636).

The spelling of 121112515 in words is "one hundred twenty-one million, one hundred twelve thousand, five hundred fifteen".