It is a happy number.
It is a congruent number.
It is an unprimeable number.
Almost surely, 2118221040 is an apocalyptic number.
118221040 is a gapful number since it is divisible by the number (10) 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 118221040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169989120).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
118221040 is a wasteful number, since it uses less digits than its factorization.
118221040 is an evil number, because the sum of its binary digits is even.
The square root of 118221040 is about 10872.9499217094. The cubic root of 118221040 is about 490.7928854098.
Adding to 118221040 its reverse (40122811), we get a palindrome (158343851).
The spelling of 118221040 in words is "one hundred eighteen million, two hundred twenty-one thousand, forty".