It is a congruent number.
Almost surely, 2121928976 is an apocalyptic number.
121928976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 121928976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190048166).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121928976 is a wasteful number, since it uses less digits than its factorization.
121928976 is an evil number, because the sum of its binary digits is even.
The square root of 121928976 is about 11042.1454437079. The cubic root of 121928976 is about 495.8713028915.
The spelling of 121928976 in words is "one hundred twenty-one million, nine hundred twenty-eight thousand, nine hundred seventy-six".