2105221712 has 20 divisors (see below), whose sum is σ = 4449673536. Its totient is φ = 956918880.

The previous prime is 2105221681. The next prime is 2105221747. The reversal of 2105221712 is 2171225012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5980568 + ... + 5980919.

Almost surely, 2^2105221712 is an apocalyptic number.

2105221712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2105221712 is an abundant number, since it is smaller than the sum of its proper divisors (2344451824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2105221712 is a wasteful number, since it uses less digits than its factorization.

2105221712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11961506 (or 11961500 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 2105221712 is about 45882.6951257225. The cubic root of 2105221712 is about 1281.6396857676.

Adding to 2105221712 its reverse (2171225012), we get a palindrome (4276446724).

The spelling of 2105221712 in words is "two billion, one hundred five million, two hundred twenty-one thousand, seven hundred twelve".