211671660149 has 2 divisors, whose sum is σ = 211671660150. Its totient is φ = 211671660148.

The previous prime is 211671660133. The next prime is 211671660199. The reversal of 211671660149 is 941066176112.

It is a happy number.

211671660149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150567280900 + 61104379249 = 388030^2 + 247193^2 .

It is a cyclic number.

It is not a de Polignac number, because 211671660149 - 2⁴ = 211671660133 is a prime.

It is a super-3 number, since 3×211671660149³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211671660119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105835830074 + 105835830075.

It is an arithmetic number, because the mean of its divisors is an integer number (105835830075).

Almost surely, 2^211671660149 is an apocalyptic number.

It is an amenable number.

211671660149 is a deficient number, since it is larger than the sum of its proper divisors (1).

211671660149 is an equidigital number, since it uses as much as digits as its factorization.

211671660149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 211671660149 in words is "two hundred eleven billion, six hundred seventy-one million, six hundred sixty thousand, one hundred forty-nine".