122115515 has 4 divisors (see below), whose sum is σ = 146538624. Its totient is φ = 97692408.

The previous prime is 122115467. The next prime is 122115523. The reversal of 122115515 is 515511221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515511221 = 29 ⋅17776249.

It is a cyclic number.

It is not a de Polignac number, because 122115515 - 2¹² = 122111419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12211547 + ... + 12211556.

It is an arithmetic number, because the mean of its divisors is an integer number (36634656).

Almost surely, 2^122115515 is an apocalyptic number.

122115515 is a deficient number, since it is larger than the sum of its proper divisors (24423109).

122115515 is an equidigital number, since it uses as much as digits as its factorization.

122115515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24423108.

The product of its digits is 500, while the sum is 23.

The square root of 122115515 is about 11050.5888983348. The cubic root of 122115515 is about 496.1240516871.

Adding to 122115515 its reverse (515511221), we get a palindrome (637626736).

The spelling of 122115515 in words is "one hundred twenty-two million, one hundred fifteen thousand, five hundred fifteen".