Adding to 21150023044361 its reverse (16344032005112), we get a palindrome (37494055049473).
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-21150023044361 is a prime.
It is a Duffinian number.
Almost surely, 221150023044361 is an apocalyptic number.
It is an amenable number.
21150023044361 is an equidigital number, since it uses as much as digits as its factorization.
21150023044361 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 319066362.
The spelling of 21150023044361 in words is "twenty-one trillion, one hundred fifty billion, twenty-three million, forty-four thousand, three hundred sixty-one".