121986216 has 64 divisors (see below), whose sum is σ = 369662400. Its totient is φ = 36964800.

The previous prime is 121986211. The next prime is 121986223. The reversal of 121986216 is 612689121.

121986216 is a `hidden beast` number, since 1 + 21 + 9 + 8 + 621 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (121986211) 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 15 ways as a sum of consecutive naturals, for example, 23295 + ... + 28046.

It is an arithmetic number, because the mean of its divisors is an integer number (5775975).

Almost surely, 2^121986216 is an apocalyptic number.

It is an amenable number.

121986216 is an abundant number, since it is smaller than the sum of its proper divisors (247676184).

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

121986216 is a wasteful number, since it uses less digits than its factorization.

121986216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51367 (or 51357 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 121986216 is about 11044.7370271999. The cubic root of 121986216 is about 495.9488869459.

The spelling of 121986216 in words is "one hundred twenty-one million, nine hundred eighty-six thousand, two hundred sixteen".