2000000211821 has 2 divisors, whose sum is σ = 2000000211822. Its totient is φ = 2000000211820.

The previous prime is 2000000211793. The next prime is 2000000211851. The reversal of 2000000211821 is 1281120000002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1569420145225 + 430580066596 = 1252765^2 + 656186^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000000211821 - 2¹⁴ = 2000000195437 is a prime.

It is a super-3 number, since 3×2000000211821³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2000000211821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000000211851) 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, 1000000105910 + 1000000105911.

It is an arithmetic number, because the mean of its divisors is an integer number (1000000105911).

Almost surely, 2^{2000000211821} is an apocalyptic number.

It is an amenable number.

2000000211821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000000211821 is an equidigital number, since it uses as much as digits as its factorization.

2000000211821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2000000211821 its reverse (1281120000002), we get a palindrome (3281120211823).

The spelling of 2000000211821 in words is "two trillion, two hundred eleven thousand, eight hundred twenty-one".