2011144021 has 2 divisors, whose sum is σ = 2011144022. Its totient is φ = 2011144020.

The previous prime is 2011144007. The next prime is 2011144027. The reversal of 2011144021 is 1204411102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1723163121 + 287980900 = 41511^2 + 16970^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011144021 - 2⁹ = 2011143509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011143986 and 2011144004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011144027) 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 as a sum of consecutive naturals, namely, 1005572010 + 1005572011.

It is an arithmetic number, because the mean of its divisors is an integer number (1005572011).

Almost surely, 2^2011144021 is an apocalyptic number.

It is an amenable number.

2011144021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011144021 is an equidigital number, since it uses as much as digits as its factorization.

2011144021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2011144021 is about 44845.7804146611. The cubic root of 2011144021 is about 1262.2568147228.

Adding to 2011144021 its reverse (1204411102), we get a palindrome (3215555123).

The spelling of 2011144021 in words is "two billion, eleven million, one hundred forty-four thousand, twenty-one".