2100434321 has 2 divisors, whose sum is σ = 2100434322. Its totient is φ = 2100434320.

The previous prime is 2100434293. The next prime is 2100434327. The reversal of 2100434321 is 1234340012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1464133696 + 636300625 = 38264^2 + 25225^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100434321 - 2¹⁸ = 2100172177 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2100434293 and 2100434302.

It is not a weakly prime, because it can be changed into another prime (2100434327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050217160 + 1050217161.

It is an arithmetic number, because the mean of its divisors is an integer number (1050217161).

Almost surely, 2^2100434321 is an apocalyptic number.

It is an amenable number.

2100434321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100434321 is an equidigital number, since it uses as much as digits as its factorization.

2100434321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2100434321 is about 45830.4955351783. The cubic root of 2100434321 is about 1280.6674418264.

Adding to 2100434321 its reverse (1234340012), we get a palindrome (3334774333).

The spelling of 2100434321 in words is "two billion, one hundred million, four hundred thirty-four thousand, three hundred twenty-one".