2123203305 has 32 divisors (see below), whose sum is σ = 3423813120. Its totient is φ = 1123511040.

The previous prime is 2123203283. The next prime is 2123203331. The reversal of 2123203305 is 5033023212.

It is not a de Polignac number, because 2123203305 - 2⁹ = 2123202793 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1924384 + ... + 1925486.

It is an arithmetic number, because the mean of its divisors is an integer number (106994160).

Almost surely, 2^2123203305 is an apocalyptic number.

It is an amenable number.

2123203305 is a deficient number, since it is larger than the sum of its proper divisors (1300609815).

2123203305 is a wasteful number, since it uses less digits than its factorization.

2123203305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 2123203305 is about 46078.2302720059. The cubic root of 2123203305 is about 1285.2783552185.

Adding to 2123203305 its reverse (5033023212), we get a palindrome (7156226517).

The spelling of 2123203305 in words is "two billion, one hundred twenty-three million, two hundred three thousand, three hundred five".