121608224 has 12 divisors (see below), whose sum is σ = 239416254. Its totient is φ = 60804096.

The previous prime is 121608211. The next prime is 121608229. The reversal of 121608224 is 422806121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 114490000 + 7118224 = 10700^2 + 2668^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121608193 and 121608202.

It is not an unprimeable number, because it can be changed into a prime (121608229) 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, 1900097 + ... + 1900160.

Almost surely, 2^121608224 is an apocalyptic number.

It is an amenable number.

121608224 is a deficient number, since it is larger than the sum of its proper divisors (117808030).

121608224 is an equidigital number, since it uses as much as digits as its factorization.

121608224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3800267 (or 3800259 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 121608224 is about 11027.6118901601. The cubic root of 121608224 is about 495.4361003904.

The spelling of 121608224 in words is "one hundred twenty-one million, six hundred eight thousand, two hundred twenty-four".