1115500001123 has 4 divisors (see below), whose sum is σ = 1145648649840. Its totient is φ = 1085351352408.

The previous prime is 1115500001051. The next prime is 1115500001129. The reversal of 1115500001123 is 3211000055111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1115500001123 - 2²² = 1115495806819 is a prime.

It is a super-2 number, since 2×1115500001123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1115500001095 and 1115500001104.

It is not an unprimeable number, because it can be changed into a prime (1115500001129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15074324303 + ... + 15074324376.

It is an arithmetic number, because the mean of its divisors is an integer number (286412162460).

Almost surely, 2^{1115500001123} is an apocalyptic number.

1115500001123 is a deficient number, since it is larger than the sum of its proper divisors (30148648717).

1115500001123 is an equidigital number, since it uses as much as digits as its factorization.

1115500001123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30148648716.

The product of its (nonzero) digits is 150, while the sum is 20.

Adding to 1115500001123 its reverse (3211000055111), we get a palindrome (4326500056234).

The spelling of 1115500001123 in words is "one trillion, one hundred fifteen billion, five hundred million, one thousand, one hundred twenty-three".