1111103042123 has 2 divisors, whose sum is σ = 1111103042124. Its totient is φ = 1111103042122.

The previous prime is 1111103042099. The next prime is 1111103042131. The reversal of 1111103042123 is 3212403011111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111103042123 - 2¹⁸ = 1111102779979 is a prime.

It is a super-2 number, since 2×1111103042123² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1111103042095 and 1111103042104.

It is not a weakly prime, because it can be changed into another prime (1111103042723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555551521061 + 555551521062.

It is an arithmetic number, because the mean of its divisors is an integer number (555551521062).

Almost surely, 2^{1111103042123} is an apocalyptic number.

1111103042123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111103042123 is an equidigital number, since it uses as much as digits as its factorization.

1111103042123 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 20.

Adding to 1111103042123 its reverse (3212403011111), we get a palindrome (4323506053234).

The spelling of 1111103042123 in words is "one trillion, one hundred eleven billion, one hundred three million, forty-two thousand, one hundred twenty-three".