2011442123 has 2 divisors, whose sum is σ = 2011442124. Its totient is φ = 2011442122.

The previous prime is 2011442093. The next prime is 2011442171. The reversal of 2011442123 is 3212441102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2011442123 - 2¹² = 2011438027 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011442095 and 2011442104.

It is not a weakly prime, because it can be changed into another prime (2011442183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005721061 + 1005721062.

It is an arithmetic number, because the mean of its divisors is an integer number (1005721062).

Almost surely, 2^2011442123 is an apocalyptic number.

2011442123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011442123 is an equidigital number, since it uses as much as digits as its factorization.

2011442123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2011442123 is about 44849.1039263885. The cubic root of 2011442123 is about 1262.3191776842.

Adding to 2011442123 its reverse (3212441102), we get a palindrome (5223883225).

The spelling of 2011442123 in words is "two billion, eleven million, four hundred forty-two thousand, one hundred twenty-three".