2105234120917 has 2 divisors, whose sum is σ = 2105234120918. Its totient is φ = 2105234120916.

The previous prime is 2105234120881. The next prime is 2105234120939. The reversal of 2105234120917 is 7190214325012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2064089649636 + 41144471281 = 1436694^2 + 202841^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105234120917 - 2¹⁵ = 2105234088149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105234120117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052617060458 + 1052617060459.

It is an arithmetic number, because the mean of its divisors is an integer number (1052617060459).

Almost surely, 2^{2105234120917} is an apocalyptic number.

It is an amenable number.

2105234120917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105234120917 is an equidigital number, since it uses as much as digits as its factorization.

2105234120917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

Adding to 2105234120917 its reverse (7190214325012), we get a palindrome (9295448445929).

The spelling of 2105234120917 in words is "two trillion, one hundred five billion, two hundred thirty-four million, one hundred twenty thousand, nine hundred seventeen".