121224500505 has 16 divisors (see below), whose sum is σ = 215510223360. Its totient is φ = 64653066864.

The previous prime is 121224500497. The next prime is 121224500513. The reversal of 121224500505 is 505005422121.

It is an interprime number because it is at equal distance from previous prime (121224500497) and next prime (121224500513).

It is not a de Polignac number, because 121224500505 - 2³ = 121224500497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 448979497 + ... + 448979766.

It is an arithmetic number, because the mean of its divisors is an integer number (13469388960).

Almost surely, 2^121224500505 is an apocalyptic number.

121224500505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121224500505 is a deficient number, since it is larger than the sum of its proper divisors (94285722855).

121224500505 is an equidigital number, since it uses as much as digits as its factorization.

121224500505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897959277 (or 897959271 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 121224500505 its reverse (505005422121), we get a palindrome (626229922626).

The spelling of 121224500505 in words is "one hundred twenty-one billion, two hundred twenty-four million, five hundred thousand, five hundred five".