2128101605 has 48 divisors (see below), whose sum is σ = 3079422720. Its totient is φ = 1406740608.

The previous prime is 2128101587. The next prime is 2128101623. The reversal of 2128101605 is 5061018212.

It is an interprime number because it is at equal distance from previous prime (2128101587) and next prime (2128101623).

It is not a de Polignac number, because 2128101605 - 2¹² = 2128097509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 830987 + ... + 833543.

It is an arithmetic number, because the mean of its divisors is an integer number (64154640).

Almost surely, 2^2128101605 is an apocalyptic number.

It is an amenable number.

2128101605 is a deficient number, since it is larger than the sum of its proper divisors (951321115).

2128101605 is a wasteful number, since it uses less digits than its factorization.

2128101605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698 (or 2691 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 2128101605 is about 46131.3516493935. The cubic root of 2128101605 is about 1286.2659892809.

Adding to 2128101605 its reverse (5061018212), we get a palindrome (7189119817).

The spelling of 2128101605 in words is "two billion, one hundred twenty-eight million, one hundred one thousand, six hundred five".