211551066710101 has 2 divisors, whose sum is σ = 211551066710102. Its totient is φ = 211551066710100.

The previous prime is 211551066710099. The next prime is 211551066710129. The reversal of 211551066710101 is 101017660155112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119609241433201 + 91941825276900 = 10936601^2 + 9588630^2 .

It is a cyclic number.

It is not a de Polignac number, because 211551066710101 - 2¹ = 211551066710099 is a prime.

Together with 211551066710099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211551066710141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105775533355050 + 105775533355051.

It is an arithmetic number, because the mean of its divisors is an integer number (105775533355051).

Almost surely, 2^{211551066710101} is an apocalyptic number.

It is an amenable number.

211551066710101 is a deficient number, since it is larger than the sum of its proper divisors (1).

211551066710101 is an equidigital number, since it uses as much as digits as its factorization.

211551066710101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 37.

The spelling of 211551066710101 in words is "two hundred eleven trillion, five hundred fifty-one billion, sixty-six million, seven hundred ten thousand, one hundred one".