221101122 is nontrivially palindromic in base 10.
221101122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
Almost surely, 2221101122 is an apocalyptic number.
221101122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 221101122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249627168).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
221101122 is a wasteful number, since it uses less digits than its factorization.
221101122 is an evil number, because the sum of its binary digits is even.
The square root of 221101122 is about 14869.4694592645. The cubic root of 221101122 is about 604.6865594027.
The spelling of 221101122 in words is "two hundred twenty-one million, one hundred one thousand, one hundred twenty-two".