2101085807 has 4 divisors (see below), whose sum is σ = 2102294376. Its totient is φ = 2099877240.

The previous prime is 2101085801. The next prime is 2101085843. The reversal of 2101085807 is 7085801012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2101085807 - 2¹⁸ = 2100823663 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 (2101085801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601673 + ... + 605154.

It is an arithmetic number, because the mean of its divisors is an integer number (525573594).

Almost surely, 2^2101085807 is an apocalyptic number.

2101085807 is a deficient number, since it is larger than the sum of its proper divisors (1208569).

2101085807 is a wasteful number, since it uses less digits than its factorization.

2101085807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208568.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 2101085807 is about 45837.6025441995. The cubic root of 2101085807 is about 1280.7998351849.

Adding to 2101085807 its reverse (7085801012), we get a palindrome (9186886819).

The spelling of 2101085807 in words is "two billion, one hundred one million, eighty-five thousand, eight hundred seven".