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 an emirpimes, since its reverse is a distinct semiprime: 10210202 = 2 ⋅5105101.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-20201201 is a prime.
It is a Duffinian number.
It is a Curzon number.
Almost surely, 220201201 is an apocalyptic number.
It is an amenable number.
20201201 is a wasteful number, since it uses less digits than its factorization.
20201201 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 18702.
The square root of 20201201 is about 4494.5746183593. The cubic root of 20201201 is about 272.3489654860.
Adding to 20201201 its reverse (10210202), we get a palindrome (30411403).
Subtracting from 20201201 its reverse (10210202), we obtain a palindrome (9990999).
The spelling of 20201201 in words is "twenty million, two hundred one thousand, two hundred one".