It is a happy number.
It is an unprimeable number.
Almost surely, 21011121120122 is an apocalyptic number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1011121120122 is a wasteful number, since it uses less digits than its factorization.
1011121120122 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 577298.
Adding to 1011121120122 its reverse (2210211211101), we get a palindrome (3221332331223).
The spelling of 1011121120122 in words is "one trillion, eleven billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twenty-two".