2101103261 has 4 divisors (see below), whose sum is σ = 2152349724. Its totient is φ = 2049856800.

The previous prime is 2101103237. The next prime is 2101103297. The reversal of 2101103261 is 1623011012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 111408025 + 1989695236 = 10555^2 + 44606^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101103261 - 2¹⁴ = 2101086877 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 (2101103231) 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, 25623170 + ... + 25623251.

It is an arithmetic number, because the mean of its divisors is an integer number (538087431).

Almost surely, 2^2101103261 is an apocalyptic number.

It is an amenable number.

2101103261 is a deficient number, since it is larger than the sum of its proper divisors (51246463).

2101103261 is an equidigital number, since it uses as much as digits as its factorization.

2101103261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51246462.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2101103261 is about 45837.7929333427. The cubic root of 2101103261 is about 1280.8033817668.

Adding to 2101103261 its reverse (1623011012), we get a palindrome (3724114273).

The spelling of 2101103261 in words is "two billion, one hundred one million, one hundred three thousand, two hundred sixty-one".