211617813266149 has 2 divisors, whose sum is σ = 211617813266150. Its totient is φ = 211617813266148.

The previous prime is 211617813266147. The next prime is 211617813266179. The reversal of 211617813266149 is 941662318716112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202149533484900 + 9468279781249 = 14217930^2 + 3077057^2 .

It is a cyclic number.

It is not a de Polignac number, because 211617813266149 - 2¹ = 211617813266147 is a prime.

Together with 211617813266147, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 211617813266093 and 211617813266102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211617813266147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105808906633074 + 105808906633075.

It is an arithmetic number, because the mean of its divisors is an integer number (105808906633075).

Almost surely, 2^{211617813266149} is an apocalyptic number.

It is an amenable number.

211617813266149 is a deficient number, since it is larger than the sum of its proper divisors (1).

211617813266149 is an equidigital number, since it uses as much as digits as its factorization.

211617813266149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 58.

The spelling of 211617813266149 in words is "two hundred eleven trillion, six hundred seventeen billion, eight hundred thirteen million, two hundred sixty-six thousand, one hundred forty-nine".