It is a congruent number.
It is an unprimeable number.
Almost surely, 21021000122012 is an apocalyptic number.
1021000122012 is a gapful number since it is divisible by the number (12) 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 1021000122012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328859051520).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1021000122012 is a wasteful number, since it uses less digits than its factorization.
1021000122012 is an evil number, because the sum of its binary digits is even.
Adding to 1021000122012 its reverse (2102210001201), we get a palindrome (3123210123213).
The spelling of 1021000122012 in words is "one trillion, twenty-one billion, one hundred twenty-two thousand, twelve".