211179478889 has 2 divisors, whose sum is σ = 211179478890. Its totient is φ = 211179478888.

The previous prime is 211179478841. The next prime is 211179478891. The reversal of 211179478889 is 988874971112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133073203264 + 78106275625 = 364792^2 + 279475^2 .

It is a cyclic number.

It is not a de Polignac number, because 211179478889 - 2⁸ = 211179478633 is a prime.

Together with 211179478891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211179478819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105589739444 + 105589739445.

It is an arithmetic number, because the mean of its divisors is an integer number (105589739445).

Almost surely, 2^211179478889 is an apocalyptic number.

It is an amenable number.

211179478889 is a deficient number, since it is larger than the sum of its proper divisors (1).

211179478889 is an equidigital number, since it uses as much as digits as its factorization.

211179478889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 65.

The spelling of 211179478889 in words is "two hundred eleven billion, one hundred seventy-nine million, four hundred seventy-eight thousand, eight hundred eighty-nine".