1111101111123 has 4 divisors (see below), whose sum is σ = 1481468148168. Its totient is φ = 740734074080.

The previous prime is 1111101111121. The next prime is 1111101111163. The reversal of 1111101111123 is 3211111011111.

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 1111101111123 - 2¹ = 1111101111121 is a prime.

It is a super-2 number, since 2×1111101111123² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1111101111121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185183518518 + ... + 185183518523.

It is an arithmetic number, because the mean of its divisors is an integer number (370367037042).

Almost surely, 2^{1111101111123} is an apocalyptic number.

1111101111123 is a deficient number, since it is larger than the sum of its proper divisors (370367037045).

1111101111123 is an equidigital number, since it uses as much as digits as its factorization.

1111101111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370367037044.

The product of its (nonzero) digits is 6, while the sum is 15.

Adding to 1111101111123 its reverse (3211111011111), we get a palindrome (4322212122234).

The spelling of 1111101111123 in words is "one trillion, one hundred eleven billion, one hundred one million, one hundred eleven thousand, one hundred twenty-three".