1123221203 has 4 divisors (see below), whose sum is σ = 1209622848. Its totient is φ = 1036819560.

The previous prime is 1123221179. The next prime is 1123221217. The reversal of 1123221203 is 3021223211.

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 1123221203 - 2⁸ = 1123220947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123221223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43200803 + ... + 43200828.

It is an arithmetic number, because the mean of its divisors is an integer number (302405712).

Almost surely, 2^1123221203 is an apocalyptic number.

1123221203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1123221203 is a deficient number, since it is larger than the sum of its proper divisors (86401645).

1123221203 is an equidigital number, since it uses as much as digits as its factorization.

1123221203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86401644.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1123221203 is about 33514.4924323792. The cubic root of 1123221203 is about 1039.4934672752.

Adding to 1123221203 its reverse (3021223211), we get a palindrome (4144444414).

The spelling of 1123221203 in words is "one billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred three".