1001203113 has 4 divisors (see below), whose sum is σ = 1334937488. Its totient is φ = 667468740.

The previous prime is 1001203109. The next prime is 1001203121. The reversal of 1001203113 is 3113021001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3113021001 = 3 ⋅1037673667.

It is not a de Polignac number, because 1001203113 - 2² = 1001203109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001203123) 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 3 ways as a sum of consecutive naturals, for example, 166867183 + ... + 166867188.

It is an arithmetic number, because the mean of its divisors is an integer number (333734372).

Almost surely, 2^1001203113 is an apocalyptic number.

It is an amenable number.

1001203113 is a deficient number, since it is larger than the sum of its proper divisors (333734375).

1001203113 is an equidigital number, since it uses as much as digits as its factorization.

1001203113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333734374.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1001203113 is about 31641.7937702653. The cubic root of 1001203113 is about 1000.4008769429.

Adding to 1001203113 its reverse (3113021001), we get a palindrome (4114224114).

The spelling of 1001203113 in words is "one billion, one million, two hundred three thousand, one hundred thirteen".