1123220233 has 4 divisors (see below), whose sum is σ = 1130374660. Its totient is φ = 1116065808.

The previous prime is 1123220221. The next prime is 1123220239. The reversal of 1123220233 is 3320223211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3320223211 = 1777 ⋅1868443.

It can be written as a sum of positive squares in 2 ways, for example, as 727488784 + 395731449 = 26972^2 + 19893^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123220233 - 2⁵ = 1123220201 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 1123220233.

It is not an unprimeable number, because it can be changed into a prime (1123220239) 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, 3576978 + ... + 3577291.

It is an arithmetic number, because the mean of its divisors is an integer number (282593665).

Almost surely, 2^1123220233 is an apocalyptic number.

It is an amenable number.

1123220233 is a deficient number, since it is larger than the sum of its proper divisors (7154427).

1123220233 is an equidigital number, since it uses as much as digits as its factorization.

1123220233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7154426.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1123220233 is about 33514.4779610245. The cubic root of 1123220233 is about 1039.4931680439.

Adding to 1123220233 its reverse (3320223211), we get a palindrome (4443443444).

The spelling of 1123220233 in words is "one billion, one hundred twenty-three million, two hundred twenty thousand, two hundred thirty-three".