2123030105 has 12 divisors (see below), whose sum is σ = 2963577060. Its totient is φ = 1455791904.

The previous prime is 2123030093. The next prime is 2123030149. The reversal of 2123030105 is 5010303212.

It can be written as a sum of positive squares in 2 ways, for example, as 217533001 + 1905497104 = 14749^2 + 43652^2 .

It is not a de Polignac number, because 2123030105 - 2¹⁴ = 2123013721 is a prime.

It is a super-2 number, since 2×2123030105² = 9014513653472622050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4332470 + ... + 4332959.

It is an arithmetic number, because the mean of its divisors is an integer number (246964755).

Almost surely, 2^2123030105 is an apocalyptic number.

It is an amenable number.

2123030105 is a deficient number, since it is larger than the sum of its proper divisors (840546955).

2123030105 is an equidigital number, since it uses as much as digits as its factorization.

2123030105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8665448 (or 8665441 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 2123030105 is about 46076.3508212185. The cubic root of 2123030105 is about 1285.2434054700.

Adding to 2123030105 its reverse (5010303212), we get a palindrome (7133333317).

The spelling of 2123030105 in words is "two billion, one hundred twenty-three million, thirty thousand, one hundred five".