Adding to 12011201201 its reverse (10210211021), we get a palindrome (22221412222).
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10210211021 = 41389 ⋅246689.
It is a cyclic number.
It is a Duffinian number.
Almost surely, 212011201201 is an apocalyptic number.
It is an amenable number.
12011201201 is a wasteful number, since it uses less digits than its factorization.
12011201201 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 219198.
The spelling of 12011201201 in words is "twelve billion, eleven million, two hundred one thousand, two hundred one".