121224503 has 4 divisors (see below), whose sum is σ = 127604760. Its totient is φ = 114844248.

The previous prime is 121224491. The next prime is 121224517. The reversal of 121224503 is 305422121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305422121 = 47 ⋅6498343.

It is a cyclic number.

It is not a de Polignac number, because 121224503 - 2⁴ = 121224487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121224563) 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, 3190100 + ... + 3190137.

It is an arithmetic number, because the mean of its divisors is an integer number (31901190).

Almost surely, 2^121224503 is an apocalyptic number.

121224503 is a deficient number, since it is larger than the sum of its proper divisors (6380257).

121224503 is an equidigital number, since it uses as much as digits as its factorization.

121224503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6380256.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 121224503 is about 11010.1999527711. The cubic root of 121224503 is about 494.9144538083.

Adding to 121224503 its reverse (305422121), we get a palindrome (426646624).

The spelling of 121224503 in words is "one hundred twenty-one million, two hundred twenty-four thousand, five hundred three".