1123003421 has 2 divisors, whose sum is σ = 1123003422. Its totient is φ = 1123003420.

The previous prime is 1123003411. The next prime is 1123003423. The reversal of 1123003421 is 1243003211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 997675396 + 125328025 = 31586^2 + 11195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123003421 is a prime.

It is a super-2 number, since 2×1123003421² = 2522273367155406482, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1123003423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123003421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123003423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561501710 + 561501711.

It is an arithmetic number, because the mean of its divisors is an integer number (561501711).

Almost surely, 2^1123003421 is an apocalyptic number.

It is an amenable number.

1123003421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123003421 is an equidigital number, since it uses as much as digits as its factorization.

1123003421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1123003421 is about 33511.2432028416. The cubic root of 1123003421 is about 1039.4262802722.

Adding to 1123003421 its reverse (1243003211), we get a palindrome (2366006632).

The spelling of 1123003421 in words is "one billion, one hundred twenty-three million, three thousand, four hundred twenty-one".