1111123423 has 4 divisors (see below), whose sum is σ = 1111437288. Its totient is φ = 1110809560.

The previous prime is 1111123379. The next prime is 1111123441. The reversal of 1111123423 is 3243211111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3243211111 = 7 ⋅463315873.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111123423 is a prime.

It is a super-2 number, since 2×1111123423² = 2469190522278473858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111123423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111121423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151561 + ... + 158722.

It is an arithmetic number, because the mean of its divisors is an integer number (277859322).

Almost surely, 2^1111123423 is an apocalyptic number.

1111123423 is a deficient number, since it is larger than the sum of its proper divisors (313865).

1111123423 is an equidigital number, since it uses as much as digits as its factorization.

1111123423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313864.

The product of its digits is 144, while the sum is 19.

The square root of 1111123423 is about 33333.5180111551. The cubic root of 1111123423 is about 1035.7479942273.

Adding to 1111123423 its reverse (3243211111), we get a palindrome (4354334534).

The spelling of 1111123423 in words is "one billion, one hundred eleven million, one hundred twenty-three thousand, four hundred twenty-three".