1111031123123 has 2 divisors, whose sum is σ = 1111031123124. Its totient is φ = 1111031123122.

The previous prime is 1111031123117. The next prime is 1111031123143. The reversal of 1111031123123 is 3213211301111.

It is an a-pointer prime, because the next prime (1111031123143) can be obtained adding 1111031123123 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111031123123 - 2⁴⁰ = 11519495347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111031123095 and 1111031123104.

It is not a weakly prime, because it can be changed into another prime (1111031123113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555515561561 + 555515561562.

It is an arithmetic number, because the mean of its divisors is an integer number (555515561562).

Almost surely, 2^{1111031123123} is an apocalyptic number.

1111031123123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111031123123 is an equidigital number, since it uses as much as digits as its factorization.

1111031123123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1111031123123 its reverse (3213211301111), we get a palindrome (4324242424234).

The spelling of 1111031123123 in words is "one trillion, one hundred eleven billion, thirty-one million, one hundred twenty-three thousand, one hundred twenty-three".