221423324122 is nontrivially palindromic in base 10.
It is an unprimeable number.
Almost surely, 2221423324122 is an apocalyptic number.
221423324122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
221423324122 is a wasteful number, since it uses less digits than its factorization.
221423324122 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 742471.
The spelling of 221423324122 in words is "two hundred twenty-one billion, four hundred twenty-three million, three hundred twenty-four thousand, one hundred twenty-two".