1001002203 has 12 divisors (see below), whose sum is σ = 1479518040. Its totient is φ = 651815136.

The previous prime is 1001002169. The next prime is 1001002217. The reversal of 1001002203 is 3022001001.

It is a happy number.

It is not a de Polignac number, because 1001002203 - 2⁶ = 1001002139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1001002243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1292898 + ... + 1293671.

It is an arithmetic number, because the mean of its divisors is an integer number (123293170).

Almost surely, 2^1001002203 is an apocalyptic number.

1001002203 is a deficient number, since it is larger than the sum of its proper divisors (478515837).

1001002203 is a wasteful number, since it uses less digits than its factorization.

1001002203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586618 (or 2586615 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1001002203 is about 31638.6188541788. The cubic root of 1001002203 is about 1000.3339561276. Note that the first 3 decimals are identical.

Adding to 1001002203 its reverse (3022001001), we get a palindrome (4023003204).

The spelling of 1001002203 in words is "one billion, one million, two thousand, two hundred three".