1123040203 has 2 divisors, whose sum is σ = 1123040204. Its totient is φ = 1123040202.

The previous prime is 1123040123. The next prime is 1123040227. The reversal of 1123040203 is 3020403211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123040203 - 2⁹ = 1123039691 is a prime.

It is a super-3 number, since 3×1123040203³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1123040263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561520101 + 561520102.

It is an arithmetic number, because the mean of its divisors is an integer number (561520102).

Almost surely, 2^1123040203 is an apocalyptic number.

1123040203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123040203 is an equidigital number, since it uses as much as digits as its factorization.

1123040203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1123040203 is about 33511.7919992351. The cubic root of 1123040203 is about 1039.4376283410.

Adding to 1123040203 its reverse (3020403211), we get a palindrome (4143443414).

The spelling of 1123040203 in words is "one billion, one hundred twenty-three million, forty thousand, two hundred three".