121344656 has 10 divisors (see below), whose sum is σ = 235105302. Its totient is φ = 60672320.

The previous prime is 121344653. The next prime is 121344661. The reversal of 121344656 is 656443121.

It can be written as a sum of positive squares in only one way, i.e., 110586256 + 10758400 = 10516^2 + 3280^2 .

It is not an unprimeable number, because it can be changed into a prime (121344653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3792005 + ... + 3792036.

Almost surely, 2^121344656 is an apocalyptic number.

121344656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121344656 is a deficient number, since it is larger than the sum of its proper divisors (113760646).

121344656 is an equidigital number, since it uses as much as digits as its factorization.

121344656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7584049 (or 7584043 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 121344656 is about 11015.6550418030. The cubic root of 121344656 is about 495.0779131176.

Adding to 121344656 its reverse (656443121), we get a palindrome (777787777).

The spelling of 121344656 in words is "one hundred twenty-one million, three hundred forty-four thousand, six hundred fifty-six".