1123221243 has 32 divisors (see below), whose sum is σ = 1589451840. Its totient is φ = 704471040.

The previous prime is 1123221223. The next prime is 1123221269. The reversal of 1123221243 is 3421223211.

It is not a de Polignac number, because 1123221243 - 2⁶ = 1123221179 is a prime.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 598755 + ... + 600627.

It is an arithmetic number, because the mean of its divisors is an integer number (49670370).

Almost surely, 2^1123221243 is an apocalyptic number.

1123221243 is a deficient number, since it is larger than the sum of its proper divisors (466230597).

1123221243 is a wasteful number, since it uses less digits than its factorization.

1123221243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079.

The product of its digits is 576, while the sum is 21.

The square root of 1123221243 is about 33514.4930291359. The cubic root of 1123221243 is about 1039.4934796147.

Adding to 1123221243 its reverse (3421223211), we get a palindrome (4544444454).

The spelling of 1123221243 in words is "one billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred forty-three".