1001131103 has 6 divisors (see below), whose sum is σ = 1164581136. Its totient is φ = 858112332.

The previous prime is 1001131049. The next prime is 1001131123. The reversal of 1001131103 is 3011311001.

It is a happy number.

It is not a de Polignac number, because 1001131103 - 2¹² = 1001127007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001131123) 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 5 ways as a sum of consecutive naturals, for example, 10215575 + ... + 10215672.

It is an arithmetic number, because the mean of its divisors is an integer number (194096856).

Almost surely, 2^1001131103 is an apocalyptic number.

1001131103 is a deficient number, since it is larger than the sum of its proper divisors (163450033).

1001131103 is an equidigital number, since it uses as much as digits as its factorization.

1001131103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20431261 (or 20431254 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 1001131103 is about 31640.6558560343. The cubic root of 1001131103 is about 1000.3768922677.

Adding to 1001131103 its reverse (3011311001), we get a palindrome (4012442104).

It can be divided in two parts, 10011 and 31103, that added together give a palindrome (41114).

The spelling of 1001131103 in words is "one billion, one million, one hundred thirty-one thousand, one hundred three".