1123303121 has 4 divisors (see below), whose sum is σ = 1125536832. Its totient is φ = 1121069412.

The previous prime is 1123303109. The next prime is 1123303157. The reversal of 1123303121 is 1213033211.

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.

It is a cyclic number.

It is not a de Polignac number, because 1123303121 - 2⁶ = 1123303057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123303121.

It is not an unprimeable number, because it can be changed into a prime (1123303171) 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, 1116101 + ... + 1117106.

It is an arithmetic number, because the mean of its divisors is an integer number (281384208).

Almost surely, 2^1123303121 is an apocalyptic number.

It is an amenable number.

1123303121 is a deficient number, since it is larger than the sum of its proper divisors (2233711).

1123303121 is an equidigital number, since it uses as much as digits as its factorization.

1123303121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233710.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1123303121 is about 33515.7145381088. The cubic root of 1123303121 is about 1039.5187372030.

Adding to 1123303121 its reverse (1213033211), we get a palindrome (2336336332).

The spelling of 1123303121 in words is "one billion, one hundred twenty-three million, three hundred three thousand, one hundred twenty-one".