121224550 has 12 divisors (see below), whose sum is σ = 225477756. Its totient is φ = 48489800.

The previous prime is 121224547. The next prime is 121224563. The reversal of 121224550 is 55422121.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 1212196 + ... + 1212295.

It is an arithmetic number, because the mean of its divisors is an integer number (18789813).

Almost surely, 2^121224550 is an apocalyptic number.

121224550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121224550 is a deficient number, since it is larger than the sum of its proper divisors (104253206).

121224550 is a wasteful number, since it uses less digits than its factorization.

121224550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424503 (or 2424498 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 121224550 is about 11010.2020871553. The cubic root of 121224550 is about 494.9145177695.

Adding to 121224550 its reverse (55422121), we get a palindrome (176646671).

The spelling of 121224550 in words is "one hundred twenty-one million, two hundred twenty-four thousand, five hundred fifty".