211208116166 has 4 divisors (see below), whose sum is σ = 316812174252. Its totient is φ = 105604058082.

The previous prime is 211208116159. The next prime is 211208116177. The reversal of 211208116166 is 661611802112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52802029040 + ... + 52802029043.

It is an arithmetic number, because the mean of its divisors is an integer number (79203043563).

Almost surely, 2^211208116166 is an apocalyptic number.

211208116166 is a deficient number, since it is larger than the sum of its proper divisors (105604058086).

211208116166 is a wasteful number, since it uses less digits than its factorization.

211208116166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105604058085.

The product of its (nonzero) digits is 6912, while the sum is 35.

Adding to 211208116166 its reverse (661611802112), we get a palindrome (872819918278).

The spelling of 211208116166 in words is "two hundred eleven billion, two hundred eight million, one hundred sixteen thousand, one hundred sixty-six".