121224115 has 4 divisors (see below), whose sum is σ = 145468944. Its totient is φ = 96979288.

The previous prime is 121224113. The next prime is 121224133. The reversal of 121224115 is 511422121.

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 121224115 - 2¹ = 121224113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121224092 and 121224101.

It is not an unprimeable number, because it can be changed into a prime (121224113) 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, 12122407 + ... + 12122416.

It is an arithmetic number, because the mean of its divisors is an integer number (36367236).

Almost surely, 2^121224115 is an apocalyptic number.

121224115 is a deficient number, since it is larger than the sum of its proper divisors (24244829).

121224115 is an equidigital number, since it uses as much as digits as its factorization.

121224115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24244828.

The product of its digits is 160, while the sum is 19.

The square root of 121224115 is about 11010.1823327318. The cubic root of 121224115 is about 494.9139257880.

Adding to 121224115 its reverse (511422121), we get a palindrome (632646236).

The spelling of 121224115 in words is "one hundred twenty-one million, two hundred twenty-four thousand, one hundred fifteen".