1001013203 has 4 divisors (see below), whose sum is σ = 1001685168. Its totient is φ = 1000341240.

The previous prime is 1001013151. The next prime is 1001013239. The reversal of 1001013203 is 3023101001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001013203 - 2²² = 996818899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001012203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333743 + ... + 336728.

It is an arithmetic number, because the mean of its divisors is an integer number (250421292).

Almost surely, 2^1001013203 is an apocalyptic number.

1001013203 is a deficient number, since it is larger than the sum of its proper divisors (671965).

1001013203 is an equidigital number, since it uses as much as digits as its factorization.

1001013203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671964.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1001013203 is about 31638.7926918838. The cubic root of 1001013203 is about 1000.3376203330.

Adding to 1001013203 its reverse (3023101001), we get a palindrome (4024114204).

The spelling of 1001013203 in words is "one billion, one million, thirteen thousand, two hundred three".