2103866121841 has 9 divisors (see below), whose sum is σ = 2312531539339. Its totient is φ = 1912591060600.

The previous prime is 2103866121829. The next prime is 2103866121871. The reversal of 2103866121841 is 1481216683012.

The square root of 2103866121841 is 1450471.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 82180262241 + 2021685859600 = 286671^2 + 1421860^2 .

It is not a de Polignac number, because 2103866121841 - 2¹³ = 2103866113649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2103866121811) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15889251 + ... + 16021111.

Almost surely, 2^{2103866121841} is an apocalyptic number.

2103866121841 is the 1450471-st square number.

2103866121841 is the 725236-th centered octagonal number.

It is an amenable number.

2103866121841 is a deficient number, since it is larger than the sum of its proper divisors (208665417498).

2103866121841 is an frugal number, since it uses more digits than its factorization.

2103866121841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263744 (or 131872 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 2103866121841 in words is "two trillion, one hundred three billion, eight hundred sixty-six million, one hundred twenty-one thousand, eight hundred forty-one".