1103123011 has 4 divisors (see below), whose sum is σ = 1104484024. Its totient is φ = 1101762000.

The previous prime is 1103122997. The next prime is 1103123017. The reversal of 1103123011 is 1103213011.

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 1103123011 - 2⁷ = 1103122883 is a prime.

It is a super-2 number, since 2×1103123011² = 2433760754795412242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1103122982 and 1103123000.

It is not an unprimeable number, because it can be changed into a prime (1103123017) 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, 679290 + ... + 680911.

It is an arithmetic number, because the mean of its divisors is an integer number (276121006).

Almost surely, 2^1103123011 is an apocalyptic number.

1103123011 is a deficient number, since it is larger than the sum of its proper divisors (1361013).

1103123011 is an equidigital number, since it uses as much as digits as its factorization.

1103123011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361012.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1103123011 is about 33213.2956961516. The cubic root of 1103123011 is about 1033.2561081957.

Adding to 1103123011 its reverse (1103213011), we get a palindrome (2206336022).

Subtracting 1103123011 from its reverse (1103213011), we obtain a square (90000 = 300²).

The spelling of 1103123011 in words is "one billion, one hundred three million, one hundred twenty-three thousand, eleven".