1001100203 has 8 divisors (see below), whose sum is σ = 1004539536. Its totient is φ = 997668000.

The previous prime is 1001100179. The next prime is 1001100223. The reversal of 1001100203 is 3020011001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001100203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001100223) 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 in 7 ways as a sum of consecutive naturals, for example, 449633 + ... + 451853.

It is an arithmetic number, because the mean of its divisors is an integer number (125567442).

Almost surely, 2^1001100203 is an apocalyptic number.

1001100203 is a deficient number, since it is larger than the sum of its proper divisors (3439333).

1001100203 is an equidigital number, since it uses as much as digits as its factorization.

1001100203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3565.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1001100203 is about 31640.1675564463. The cubic root of 1001100203 is about 1000.3665999214.

Adding to 1001100203 its reverse (3020011001), we get a palindrome (4021111204).

The spelling of 1001100203 in words is "one billion, one million, one hundred thousand, two hundred three".