2011230021 has 16 divisors (see below), whose sum is σ = 2716588224. Its totient is φ = 1323377664.

The previous prime is 2011230019. The next prime is 2011230071. The reversal of 2011230021 is 1200321102.

It is not a de Polignac number, because 2011230021 - 2¹ = 2011230019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011229979 and 2011230006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011230071) 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 in 15 ways as a sum of consecutive naturals, for example, 299715 + ... + 306351.

It is an arithmetic number, because the mean of its divisors is an integer number (169786764).

Almost surely, 2^2011230021 is an apocalyptic number.

It is an amenable number.

2011230021 is a deficient number, since it is larger than the sum of its proper divisors (705358203).

2011230021 is a wasteful number, since it uses less digits than its factorization.

2011230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7940.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2011230021 is about 44846.7392460143. The cubic root of 2011230021 is about 1262.2748065618.

Adding to 2011230021 its reverse (1200321102), we get a palindrome (3211551123).

The spelling of 2011230021 in words is "two billion, eleven million, two hundred thirty thousand, twenty-one".