2101807812 has 96 divisors (see below), whose sum is σ = 5468431360. Its totient is φ = 623946240.

The previous prime is 2101807811. The next prime is 2101807823. The reversal of 2101807812 is 2187081012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101807812.

It is not an unprimeable number, because it can be changed into a prime (2101807811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2964114 + ... + 2964822.

Almost surely, 2^2101807812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2101807812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2734215680).

2101807812 is an abundant number, since it is smaller than the sum of its proper divisors (3366623548).

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

2101807812 is a wasteful number, since it uses less digits than its factorization.

2101807812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1371 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 2101807812 is about 45845.4775523170. The cubic root of 2101807812 is about 1280.9465272711.

Adding to 2101807812 its reverse (2187081012), we get a palindrome (4288888824).

The spelling of 2101807812 in words is "two billion, one hundred one million, eight hundred seven thousand, eight hundred twelve".