121608216 has 80 divisors (see below), whose sum is σ = 345822840. Its totient is φ = 39916800.

The previous prime is 121608211. The next prime is 121608229. The reversal of 121608216 is 612806121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121608216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121608211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42016 + ... + 44816.

Almost surely, 2^121608216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121608216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172911420).

121608216 is an abundant number, since it is smaller than the sum of its proper divisors (224214624).

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

121608216 is a wasteful number, since it uses less digits than its factorization.

121608216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886 (or 2873 counting only the distinct ones).

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

The square root of 121608216 is about 11027.6115274342. The cubic root of 121608216 is about 495.4360895263.

The spelling of 121608216 in words is "one hundred twenty-one million, six hundred eight thousand, two hundred sixteen".