It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a Duffinian number.
Almost surely, 221352525201211 is an apocalyptic number.
21352525201211 is a wasteful number, since it uses less digits than its factorization.
21352525201211 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 18359868060.
Adding to 21352525201211 its reverse (11210252525312), we get a palindrome (32562777726523).
The spelling of 21352525201211 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred one thousand, two hundred eleven".