121806216 has 48 divisors (see below), whose sum is σ = 377020800. Its totient is φ = 34801632.

The previous prime is 121806211. The next prime is 121806263. The reversal of 121806216 is 612608121.

It is a self number, because there is not a number n which added to its sum of digits gives 121806216.

It is not an unprimeable number, because it can be changed into a prime (121806211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120336 + ... + 121343.

It is an arithmetic number, because the mean of its divisors is an integer number (7854600).

Almost surely, 2^121806216 is an apocalyptic number.

It is an amenable number.

121806216 is an abundant number, since it is smaller than the sum of its proper divisors (255214584).

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

121806216 is a wasteful number, since it uses less digits than its factorization.

121806216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241698 (or 241691 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 121806216 is about 11036.5853414904. The cubic root of 121806216 is about 495.7048300154.

The spelling of 121806216 in words is "one hundred twenty-one million, eight hundred six thousand, two hundred sixteen".