It is a happy number.
It is a strong prime.
It is a cyclic number.
Almost surely, 2121210118016697 is an apocalyptic number.
It is an amenable number.
121210118016697 is an equidigital number, since it uses as much as digits as its factorization.
121210118016697 is an evil number, because the sum of its binary digits is even.
The spelling of 121210118016697 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred eighteen million, sixteen thousand, six hundred ninety-seven".