121894188 has 48 divisors (see below), whose sum is σ = 307566336. Its totient is φ = 37350720.

The previous prime is 121894151. The next prime is 121894211. The reversal of 121894188 is 881498121.

It is a super-3 number, since 3×121894188³ (a number of 25 digits) contains 333 as substring.

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, 39543 + ... + 42513.

It is an arithmetic number, because the mean of its divisors is an integer number (6407632).

Almost surely, 2^121894188 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 121894188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153783168).

121894188 is an abundant number, since it is smaller than the sum of its proper divisors (185672148).

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

121894188 is a wasteful number, since it uses less digits than its factorization.

121894188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3254 (or 3252 counting only the distinct ones).

The product of its digits is 36864, while the sum is 42.

The square root of 121894188 is about 11040.5700939761. The cubic root of 121894188 is about 495.8241387902.

The spelling of 121894188 in words is "one hundred twenty-one million, eight hundred ninety-four thousand, one hundred eighty-eight".