1115117123 has 2 divisors, whose sum is σ = 1115117124. Its totient is φ = 1115117122.

The previous prime is 1115117111. The next prime is 1115117131. The reversal of 1115117123 is 3217115111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1115117123 - 2²⁰ = 1114068547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1115117183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557558561 + 557558562.

It is an arithmetic number, because the mean of its divisors is an integer number (557558562).

Almost surely, 2^1115117123 is an apocalyptic number.

1115117123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115117123 is an equidigital number, since it uses as much as digits as its factorization.

1115117123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 210, while the sum is 23.

The square root of 1115117123 is about 33393.3694466431. The cubic root of 1115117123 is about 1036.9874367183.

The spelling of 1115117123 in words is "one billion, one hundred fifteen million, one hundred seventeen thousand, one hundred twenty-three".