2112011021 has 2 divisors, whose sum is σ = 2112011022. Its totient is φ = 2112011020.

The previous prime is 2112011017. The next prime is 2112011053. The reversal of 2112011021 is 1201102112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2111862025 + 148996 = 45955^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112011021 - 2² = 2112011017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2112010993 and 2112011011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112011071) 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, 1056005510 + 1056005511.

It is an arithmetic number, because the mean of its divisors is an integer number (1056005511).

Almost surely, 2^2112011021 is an apocalyptic number.

It is an amenable number.

2112011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112011021 is an equidigital number, since it uses as much as digits as its factorization.

2112011021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2112011021 is about 45956.6210790132. The cubic root of 2112011021 is about 1283.0159637013.

Adding to 2112011021 its reverse (1201102112), we get a palindrome (3313113133).

The spelling of 2112011021 in words is "two billion, one hundred twelve million, eleven thousand, twenty-one".