1001123303 has 4 divisors (see below), whose sum is σ = 1001349648. Its totient is φ = 1000896960.

The previous prime is 1001123293. The next prime is 1001123309. The reversal of 1001123303 is 3033211001.

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 1001123303 - 2²⁰ = 1000074727 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 (1001123309) 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, 106403 + ... + 115428.

It is an arithmetic number, because the mean of its divisors is an integer number (250337412).

Almost surely, 2^1001123303 is an apocalyptic number.

1001123303 is a deficient number, since it is larger than the sum of its proper divisors (226345).

1001123303 is an equidigital number, since it uses as much as digits as its factorization.

1001123303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226344.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 1001123303 is about 31640.5325966552. The cubic root of 1001123303 is about 1000.3742942197.

Adding to 1001123303 its reverse (3033211001), we get a palindrome (4034334304).

The spelling of 1001123303 in words is "one billion, one million, one hundred twenty-three thousand, three hundred three".