1105123511105 has 4 divisors (see below), whose sum is σ = 1326148213332. Its totient is φ = 884098808880.

The previous prime is 1105123511081. The next prime is 1105123511117. The reversal of 1105123511105 is 5011153215011.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 419898816016 + 685224695089 = 647996^2 + 827783^2 .

It is not a de Polignac number, because 1105123511105 - 2¹² = 1105123507009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110512351106 + ... + 110512351115.

It is an arithmetic number, because the mean of its divisors is an integer number (331537053333).

Almost surely, 2^{1105123511105} is an apocalyptic number.

It is an amenable number.

1105123511105 is a deficient number, since it is larger than the sum of its proper divisors (221024702227).

1105123511105 is an equidigital number, since it uses as much as digits as its factorization.

1105123511105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221024702226.

The product of its (nonzero) digits is 750, while the sum is 26.

Adding to 1105123511105 its reverse (5011153215011), we get a palindrome (6116276726116).

The spelling of 1105123511105 in words is "one trillion, one hundred five billion, one hundred twenty-three million, five hundred eleven thousand, one hundred five".