121633216 has 28 divisors (see below), whose sum is σ = 242105688. Its totient is φ = 60630272.

The previous prime is 121633159. The next prime is 121633229. The reversal of 121633216 is 612336121.

It is a zygodrome in base 2.

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 3 ways as a sum of consecutive naturals, for example, 19470 + ... + 24946.

Almost surely, 2^121633216 is an apocalyptic number.

121633216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121633216 is a deficient number, since it is larger than the sum of its proper divisors (120472472).

121633216 is an equidigital number, since it uses as much as digits as its factorization.

121633216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5836 (or 5826 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 121633216 is about 11028.7449875314. The cubic root of 121633216 is about 495.4700374891.

Adding to 121633216 its reverse (612336121), we get a palindrome (733969337).

The spelling of 121633216 in words is "one hundred twenty-one million, six hundred thirty-three thousand, two hundred sixteen".