2011004123 has 4 divisors (see below), whose sum is σ = 2019863400. Its totient is φ = 2002144848.

The previous prime is 2011004089. The next prime is 2011004143. The reversal of 2011004123 is 3214001102.

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 2011004123 - 2⁶ = 2011004059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011004098 and 2011004107.

It is not an unprimeable number, because it can be changed into a prime (2011004143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4429298 + ... + 4429751.

It is an arithmetic number, because the mean of its divisors is an integer number (504965850).

Almost surely, 2^2011004123 is an apocalyptic number.

2011004123 is a deficient number, since it is larger than the sum of its proper divisors (8859277).

2011004123 is an equidigital number, since it uses as much as digits as its factorization.

2011004123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8859276.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2011004123 is about 44844.2206198302. The cubic root of 2011004123 is about 1262.2275459257.

Adding to 2011004123 its reverse (3214001102), we get a palindrome (5225005225).

The spelling of 2011004123 in words is "two billion, eleven million, four thousand, one hundred twenty-three".