116821811871 has 14 divisors (see below), whose sum is σ = 175152594200. Its totient is φ = 77881207428.

The previous prime is 116821811867. The next prime is 116821811891. The reversal of 116821811871 is 178118128611.

It is not a de Polignac number, because 116821811871 - 2² = 116821811867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116821811851) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 80123971 + ... + 80125428.

Almost surely, 2^116821811871 is an apocalyptic number.

116821811871 is a deficient number, since it is larger than the sum of its proper divisors (58330782329).

116821811871 is an frugal number, since it uses more digits than its factorization.

116821811871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160249417 (or 160249402 counting only the distinct ones).

The product of its digits is 43008, while the sum is 45.

The spelling of 116821811871 in words is "one hundred sixteen billion, eight hundred twenty-one million, eight hundred eleven thousand, eight hundred seventy-one".