1001012203 has 2 divisors, whose sum is σ = 1001012204. Its totient is φ = 1001012202.

The previous prime is 1001012197. The next prime is 1001012237. The reversal of 1001012203 is 3022101001.

It is a weak prime.

It is an emirp because it is prime and its reverse (3022101001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-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.

It is not a weakly prime, because it can be changed into another prime (1001012273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500506101 + 500506102.

It is an arithmetic number, because the mean of its divisors is an integer number (500506102).

Almost surely, 2^1001012203 is an apocalyptic number.

1001012203 is a deficient number, since it is larger than the sum of its proper divisors (1).

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 product of its (nonzero) digits is 12, while the sum is 10.

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".