121789116 has 48 divisors (see below), whose sum is σ = 320481280. Its totient is φ = 39988080.

The previous prime is 121789097. The next prime is 121789141. The reversal of 121789116 is 611987121.

It is a super-2 number, since 2×121789116² = 29665177552122912, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1180 + ... + 15651.

Almost surely, 2^121789116 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 121789116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160240640).

121789116 is an abundant number, since it is smaller than the sum of its proper divisors (198692164).

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

121789116 is a wasteful number, since it uses less digits than its factorization.

121789116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16911 (or 16903 counting only the distinct ones).

The product of its digits is 6048, while the sum is 36.

The square root of 121789116 is about 11035.8106181648. The cubic root of 121789116 is about 495.6816321044.

The spelling of 121789116 in words is "one hundred twenty-one million, seven hundred eighty-nine thousand, one hundred sixteen".