2100110521 has 8 divisors (see below), whose sum is σ = 2244048840. Its totient is φ = 1958439168.

The previous prime is 2100110503. The next prime is 2100110549. The reversal of 2100110521 is 1250110012.

It can be written as a sum of positive squares in 4 ways, for example, as 779805625 + 1320304896 = 27925^2 + 36336^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2100110521 - 2¹⁵ = 2100077753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100110581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564826 + ... + 568531.

It is an arithmetic number, because the mean of its divisors is an integer number (280506105).

Almost surely, 2^2100110521 is an apocalyptic number.

It is an amenable number.

2100110521 is a deficient number, since it is larger than the sum of its proper divisors (143938319).

2100110521 is a wasteful number, since it uses less digits than its factorization.

2100110521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133483.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 2100110521 is about 45826.9628166650. The cubic root of 2100110521 is about 1280.6016298140.

Adding to 2100110521 its reverse (1250110012), we get a palindrome (3350220533).

The spelling of 2100110521 in words is "two billion, one hundred million, one hundred ten thousand, five hundred twenty-one".