It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1001012203 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 1001012203.
Almost surely, 21001012203 is an apocalyptic number.
1001012203 is an equidigital number, since it uses as much as digits as its factorization.
1001012203 is an evil number, because the sum of its binary digits is even.
The square root of 1001012203 is about 31638.7768884955. The cubic root of 1001012203 is about 1000.3372872245.
Adding to 1001012203 its reverse (3022101001), we get a palindrome (4023113204).
The spelling of 1001012203 in words is "one billion, one million, twelve thousand, two hundred three".