212000010020261 has 2 divisors, whose sum is σ = 212000010020262. Its totient is φ = 212000010020260.

The previous prime is 212000010020209. The next prime is 212000010020311. The reversal of 212000010020261 is 162020010000212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204912067562500 + 7087942457761 = 14314750^2 + 2662319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212000010020261 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212000010020761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000005010130 + 106000005010131.

It is an arithmetic number, because the mean of its divisors is an integer number (106000005010131).

Almost surely, 2^{212000010020261} is an apocalyptic number.

It is an amenable number.

212000010020261 is a deficient number, since it is larger than the sum of its proper divisors (1).

212000010020261 is an equidigital number, since it uses as much as digits as its factorization.

212000010020261 is an evil number, because the sum of its binary digits is even.

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

Adding to 212000010020261 its reverse (162020010000212), we get a palindrome (374020020020473).

The spelling of 212000010020261 in words is "two hundred twelve trillion, ten million, twenty thousand, two hundred sixty-one".