2000020211261 has 2 divisors, whose sum is σ = 2000020211262. Its totient is φ = 2000020211260.

The previous prime is 2000020211237. The next prime is 2000020211281. The reversal of 2000020211261 is 1621120200002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1891848948025 + 108171263236 = 1375445^2 + 328894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2000020211261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000020211281) 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, 1000010105630 + 1000010105631.

It is an arithmetic number, because the mean of its divisors is an integer number (1000010105631).

Almost surely, 2^{2000020211261} is an apocalyptic number.

It is an amenable number.

2000020211261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000020211261 is an equidigital number, since it uses as much as digits as its factorization.

2000020211261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2000020211261 its reverse (1621120200002), we get a palindrome (3621140411263).

The spelling of 2000020211261 in words is "two trillion, twenty million, two hundred eleven thousand, two hundred sixty-one".