1113440123 has 16 divisors (see below), whose sum is σ = 1170074400. Its totient is φ = 1058158080.

The previous prime is 1113440117. The next prime is 1113440161. The reversal of 1113440123 is 3210443111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113440123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1113440095 and 1113440104.

It is not an unprimeable number, because it can be changed into a prime (1113440173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514163 + ... + 516323.

It is an arithmetic number, because the mean of its divisors is an integer number (73129650).

Almost surely, 2^1113440123 is an apocalyptic number.

1113440123 is a deficient number, since it is larger than the sum of its proper divisors (56634277).

1113440123 is a wasteful number, since it uses less digits than its factorization.

1113440123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2462.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1113440123 is about 33368.2502238280. The cubic root of 1113440123 is about 1036.4673417476.

Adding to 1113440123 its reverse (3210443111), we get a palindrome (4323883234).

The spelling of 1113440123 in words is "one billion, one hundred thirteen million, four hundred forty thousand, one hundred twenty-three".