1000001203 has 2 divisors, whose sum is σ = 1000001204. Its totient is φ = 1000001202.

The previous prime is 1000001161. The next prime is 1000001213. The reversal of 1000001203 is 3021000001.

It is a strong prime.

It is an emirp because it is prime and its reverse (3021000001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000001203 - 2²¹ = 997904051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000001213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000601 + 500000602.

It is an arithmetic number, because the mean of its divisors is an integer number (500000602).

Almost surely, 2^1000001203 is an apocalyptic number.

1000001203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000001203 is an equidigital number, since it uses as much as digits as its factorization.

1000001203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 1000001203 is about 31622.7956227782. The cubic root of 1000001203 is about 1000.0004009998. Note that the first 3 decimals are identical.

Adding to 1000001203 its reverse (3021000001), we get a palindrome (4021001204).

The spelling of 1000001203 in words is "one billion, one thousand, two hundred three".