2011220221009 has 2 divisors, whose sum is σ = 2011220221010. Its totient is φ = 2011220221008.

The previous prime is 2011220221007. The next prime is 2011220221081. The reversal of 2011220221009 is 9001220221102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1984562475025 + 26657745984 = 1408745^2 + 163272^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011220221009 - 2¹ = 2011220221007 is a prime.

Together with 2011220221007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2011220221001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005610110504 + 1005610110505.

It is an arithmetic number, because the mean of its divisors is an integer number (1005610110505).

Almost surely, 2^{2011220221009} is an apocalyptic number.

It is an amenable number.

2011220221009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011220221009 is an equidigital number, since it uses as much as digits as its factorization.

2011220221009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 2011220221009 in words is "two trillion, eleven billion, two hundred twenty million, two hundred twenty-one thousand, nine".