2011022021 has 16 divisors (see below), whose sum is σ = 2168467200. Its totient is φ = 1858019328.

The previous prime is 2011022011. The next prime is 2011022029. The reversal of 2011022021 is 1202201102.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011022021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2011021993 and 2011022011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011022029) 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, 1412516 + ... + 1413938.

It is an arithmetic number, because the mean of its divisors is an integer number (135529200).

Almost surely, 2^2011022021 is an apocalyptic number.

It is an amenable number.

2011022021 is a deficient number, since it is larger than the sum of its proper divisors (157445179).

2011022021 is a wasteful number, since it uses less digits than its factorization.

2011022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2011022021 is about 44844.4201768737. The cubic root of 2011022021 is about 1262.2312905362.

Adding to 2011022021 its reverse (1202201102), we get a palindrome (3213223123).

The spelling of 2011022021 in words is "two billion, eleven million, twenty-two thousand, twenty-one".