1111403123 has 4 divisors (see below), whose sum is σ = 1116299400. Its totient is φ = 1106506848.

The previous prime is 1111403107. The next prime is 1111403129. The reversal of 1111403123 is 3213041111.

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 1111403123 - 2⁴ = 1111403107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111403129) 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, 2447798 + ... + 2448251.

It is an arithmetic number, because the mean of its divisors is an integer number (279074850).

Almost surely, 2^1111403123 is an apocalyptic number.

1111403123 is a deficient number, since it is larger than the sum of its proper divisors (4896277).

1111403123 is an equidigital number, since it uses as much as digits as its factorization.

1111403123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896276.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1111403123 is about 33337.7132239150. The cubic root of 1111403123 is about 1035.8348955871.

Adding to 1111403123 its reverse (3213041111), we get a palindrome (4324444234).

The spelling of 1111403123 in words is "one billion, one hundred eleven million, four hundred three thousand, one hundred twenty-three".