211170805889 has 2 divisors, whose sum is σ = 211170805890. Its totient is φ = 211170805888.

The previous prime is 211170805861. The next prime is 211170805903. The reversal of 211170805889 is 988508071112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209709043600 + 1461762289 = 457940^2 + 38233^2 .

It is a cyclic number.

It is not a de Polignac number, because 211170805889 - 2³² = 206875838593 is a prime.

It is not a weakly prime, because it can be changed into another prime (211170805789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105585402944 + 105585402945.

It is an arithmetic number, because the mean of its divisors is an integer number (105585402945).

Almost surely, 2^211170805889 is an apocalyptic number.

It is an amenable number.

211170805889 is a deficient number, since it is larger than the sum of its proper divisors (1).

211170805889 is an equidigital number, since it uses as much as digits as its factorization.

211170805889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 50.

The spelling of 211170805889 in words is "two hundred eleven billion, one hundred seventy million, eight hundred five thousand, eight hundred eighty-nine".