1223123243 has 2 divisors, whose sum is σ = 1223123244. Its totient is φ = 1223123242.

The previous prime is 1223123203. The next prime is 1223123281. The reversal of 1223123243 is 3423213221.

It is a strong prime.

It is an emirp because it is prime and its reverse (3423213221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223123243 - 2¹⁸ = 1222861099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223123203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611561621 + 611561622.

It is an arithmetic number, because the mean of its divisors is an integer number (611561622).

Almost surely, 2^1223123243 is an apocalyptic number.

1223123243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223123243 is an equidigital number, since it uses as much as digits as its factorization.

1223123243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

The square root of 1223123243 is about 34973.1789089868. The cubic root of 1223123243 is about 1069.4407777428.

Adding to 1223123243 its reverse (3423213221), we get a palindrome (4646336464).

The spelling of 1223123243 in words is "one billion, two hundred twenty-three million, one hundred twenty-three thousand, two hundred forty-three".