121204416 has 28 divisors (see below), whose sum is σ = 320687192. Its totient is φ = 40401408.

The previous prime is 121204393. The next prime is 121204417. The reversal of 121204416 is 614402121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121204392 and 121204401.

It is not an unprimeable number, because it can be changed into a prime (121204417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315445 + ... + 315828.

It is an arithmetic number, because the mean of its divisors is an integer number (11453114).

Almost surely, 2^121204416 is an apocalyptic number.

121204416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121204416 is an abundant number, since it is smaller than the sum of its proper divisors (199482776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121204416 is an equidigital number, since it uses as much as digits as its factorization.

121204416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631288 (or 631278 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 121204416 is about 11009.2877153792. The cubic root of 121204416 is about 494.8871163875.

Adding to 121204416 its reverse (614402121), we get a palindrome (735606537).

The spelling of 121204416 in words is "one hundred twenty-one million, two hundred four thousand, four hundred sixteen".