2002221001811 has 2 divisors, whose sum is σ = 2002221001812. Its totient is φ = 2002221001810.

The previous prime is 2002221001733. The next prime is 2002221001841. The reversal of 2002221001811 is 1181001222002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002221001811 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2002221001841) 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, 1001110500905 + 1001110500906.

It is an arithmetic number, because the mean of its divisors is an integer number (1001110500906).

Almost surely, 2^{2002221001811} is an apocalyptic number.

2002221001811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002221001811 is an equidigital number, since it uses as much as digits as its factorization.

2002221001811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 2002221001811 its reverse (1181001222002), we get a palindrome (3183222223813).

The spelling of 2002221001811 in words is "two trillion, two billion, two hundred twenty-one million, one thousand, eight hundred eleven".