2105221318 has 24 divisors (see below), whose sum is σ = 3336691320. Its totient is φ = 996040800.

The previous prime is 2105221297. The next prime is 2105221343. The reversal of 2105221318 is 8131225012.

It is a junction number, because it is equal to n+sod(n) for n = 2105221292 and 2105221301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1168018 + ... + 1169818.

It is an arithmetic number, because the mean of its divisors is an integer number (139028805).

Almost surely, 2^2105221318 is an apocalyptic number.

2105221318 is a deficient number, since it is larger than the sum of its proper divisors (1231470002).

2105221318 is a wasteful number, since it uses less digits than its factorization.

2105221318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460 (or 3441 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 2105221318 is about 45882.6908321646. The cubic root of 2105221318 is about 1281.6396058131.

The spelling of 2105221318 in words is "two billion, one hundred five million, two hundred twenty-one thousand, three hundred eighteen".