1001131303 has 4 divisors (see below), whose sum is σ = 1001200888. Its totient is φ = 1001061720.

The previous prime is 1001131283. The next prime is 1001131357. The reversal of 1001131303 is 3031311001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3031311001 = 367 ⋅8259703.

It is a cyclic number.

It is not a de Polignac number, because 1001131303 - 2¹³ = 1001123111 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 (1001101303) 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, 4308 + ... + 44953.

It is an arithmetic number, because the mean of its divisors is an integer number (250300222).

Almost surely, 2^1001131303 is an apocalyptic number.

1001131303 is a deficient number, since it is larger than the sum of its proper divisors (69585).

1001131303 is an equidigital number, since it uses as much as digits as its factorization.

1001131303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69584.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 1001131303 is about 31640.6590165249. The cubic root of 1001131303 is about 1000.3769588841.

Adding to 1001131303 its reverse (3031311001), we get a palindrome (4032442304).

It can be divided in two parts, 10011 and 31303, that added together give a palindrome (41314).

The spelling of 1001131303 in words is "one billion, one million, one hundred thirty-one thousand, three hundred three".