2001210001811 has 2 divisors, whose sum is σ = 2001210001812. Its totient is φ = 2001210001810.

The previous prime is 2001210001759. The next prime is 2001210001829. The reversal of 2001210001811 is 1181000121002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001210001811 - 2¹⁴ = 2001209985427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001210001811.

It is not a weakly prime, because it can be changed into another prime (2001210001831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000605000905 + 1000605000906.

It is an arithmetic number, because the mean of its divisors is an integer number (1000605000906).

Almost surely, 2^{2001210001811} is an apocalyptic number.

2001210001811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001210001811 is an equidigital number, since it uses as much as digits as its factorization.

2001210001811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2001210001811 its reverse (1181000121002), we get a palindrome (3182210122813).

The spelling of 2001210001811 in words is "two trillion, one billion, two hundred ten million, one thousand, eight hundred eleven".