2101133805 has 32 divisors (see below), whose sum is σ = 3433466880. Its totient is φ = 1096972800.

The previous prime is 2101133803. The next prime is 2101133821. The reversal of 2101133805 is 5083311012.

It is not a de Polignac number, because 2101133805 - 2¹ = 2101133803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101133803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127044 + ... + 142626.

It is an arithmetic number, because the mean of its divisors is an integer number (107295840).

Almost surely, 2^2101133805 is an apocalyptic number.

It is an amenable number.

2101133805 is a deficient number, since it is larger than the sum of its proper divisors (1332333075).

2101133805 is a wasteful number, since it uses less digits than its factorization.

2101133805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15781.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 2101133805 is about 45838.1261069865. The cubic root of 2101133805 is about 1280.8095881362.

Adding to 2101133805 its reverse (5083311012), we get a palindrome (7184444817).

The spelling of 2101133805 in words is "two billion, one hundred one million, one hundred thirty-three thousand, eight hundred five".