121183816 has 24 divisors (see below), whose sum is σ = 246045330. Its totient is φ = 55930368.

The previous prime is 121183801. The next prime is 121183819. The reversal of 121183816 is 618381121.

It can be written as a sum of positive squares in 3 ways, for example, as 27984100 + 93199716 = 5290^2 + 9654^2 .

It is not an unprimeable number, because it can be changed into a prime (121183819) 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 in 5 ways as a sum of consecutive naturals, for example, 43465 + ... + 46168.

Almost surely, 2^121183816 is an apocalyptic number.

It is an amenable number.

121183816 is an abundant number, since it is smaller than the sum of its proper divisors (124861514).

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

121183816 is a wasteful number, since it uses less digits than its factorization.

121183816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89665 (or 89648 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 121183816 is about 11008.3521019270. The cubic root of 121183816 is about 494.8590776615.

The spelling of 121183816 in words is "one hundred twenty-one million, one hundred eighty-three thousand, eight hundred sixteen".