1123123012103 has 2 divisors, whose sum is σ = 1123123012104. Its totient is φ = 1123123012102.

The previous prime is 1123123012091. The next prime is 1123123012117. The reversal of 1123123012103 is 3012103213211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123123012103 is a prime.

It is a super-2 number, since 2×1123123012103² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123123012133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561561506051 + 561561506052.

It is an arithmetic number, because the mean of its divisors is an integer number (561561506052).

Almost surely, 2^{1123123012103} is an apocalyptic number.

1123123012103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123123012103 is an equidigital number, since it uses as much as digits as its factorization.

1123123012103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1123123012103 its reverse (3012103213211), we get a palindrome (4135226225314).

The spelling of 1123123012103 in words is "one trillion, one hundred twenty-three billion, one hundred twenty-three million, twelve thousand, one hundred three".