Adding to 1212211001010 its reverse (101001122121), we get a palindrome (1313212123131).
It is an unprimeable number.
Almost surely, 21212211001010 is an apocalyptic number.
1212211001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1212211001010 is a wasteful number, since it uses less digits than its factorization.
1212211001010 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1660818.
The spelling of 1212211001010 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one thousand, ten".