2011103123 has 4 divisors (see below), whose sum is σ = 2012569248. Its totient is φ = 2009637000.

The previous prime is 2011103093. The next prime is 2011103137. The reversal of 2011103123 is 3213011102.

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 2011103123 - 2⁸ = 2011102867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011103098 and 2011103107.

It is not an unprimeable number, because it can be changed into a prime (2011103183) 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, 731003 + ... + 733748.

It is an arithmetic number, because the mean of its divisors is an integer number (503142312).

Almost surely, 2^2011103123 is an apocalyptic number.

2011103123 is a deficient number, since it is larger than the sum of its proper divisors (1466125).

2011103123 is a wasteful number, since it uses less digits than its factorization.

2011103123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466124.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2011103123 is about 44845.3244274138. The cubic root of 2011103123 is about 1262.2482583773.

Adding to 2011103123 its reverse (3213011102), we get a palindrome (5224114225).

The spelling of 2011103123 in words is "two billion, eleven million, one hundred three thousand, one hundred twenty-three".