2125210305 has 16 divisors (see below), whose sum is σ = 3401176320. Its totient is φ = 1133165568.

The previous prime is 2125210303. The next prime is 2125210309. The reversal of 2125210305 is 5030125212.

It is not a de Polignac number, because 2125210305 - 2¹ = 2125210303 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2125210303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54936 + ... + 85254.

It is an arithmetic number, because the mean of its divisors is an integer number (212573520).

Almost surely, 2^2125210305 is an apocalyptic number.

It is an amenable number.

2125210305 is a deficient number, since it is larger than the sum of its proper divisors (1275966015).

2125210305 is a wasteful number, since it uses less digits than its factorization.

2125210305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35000.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2125210305 is about 46100.0033080259. The cubic root of 2125210305 is about 1285.6832059595.

Adding to 2125210305 its reverse (5030125212), we get a palindrome (7155335517).

The spelling of 2125210305 in words is "two billion, one hundred twenty-five million, two hundred ten thousand, three hundred five".