2118711321 has 12 divisors (see below), whose sum is σ = 3061002672. Its totient is φ = 1412177976.

The previous prime is 2118711313. The next prime is 2118711323. The reversal of 2118711321 is 1231178112.

2118711321 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2118711321 - 2³ = 2118711313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2118711323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26110 + ... + 70136.

It is an arithmetic number, because the mean of its divisors is an integer number (255083556).

Almost surely, 2^2118711321 is an apocalyptic number.

It is an amenable number.

2118711321 is a deficient number, since it is larger than the sum of its proper divisors (942291351).

2118711321 is a wasteful number, since it uses less digits than its factorization.

2118711321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49380 (or 49377 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 2118711321 is about 46029.4614459044. The cubic root of 2118711321 is about 1284.3713096951.

Adding to 2118711321 its reverse (1231178112), we get a palindrome (3349889433).

The spelling of 2118711321 in words is "two billion, one hundred eighteen million, seven hundred eleven thousand, three hundred twenty-one".