1123220443 has 2 divisors, whose sum is σ = 1123220444. Its totient is φ = 1123220442.

The previous prime is 1123220437. The next prime is 1123220453. The reversal of 1123220443 is 3440223211.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123220443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123220453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561610221 + 561610222.

It is an arithmetic number, because the mean of its divisors is an integer number (561610222).

Almost surely, 2^1123220443 is an apocalyptic number.

1123220443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123220443 is an equidigital number, since it uses as much as digits as its factorization.

1123220443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1123220443 is about 33514.4810939988. The cubic root of 1123220443 is about 1039.4932328260.

Adding to 1123220443 its reverse (3440223211), we get a palindrome (4563443654).

The spelling of 1123220443 in words is "one billion, one hundred twenty-three million, two hundred twenty thousand, four hundred forty-three".