2125442321 has 2 divisors, whose sum is σ = 2125442322. Its totient is φ = 2125442320.

The previous prime is 2125442309. The next prime is 2125442387. The reversal of 2125442321 is 1232445212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1371665296 + 753777025 = 37036^2 + 27455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2125442321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2125442021) by changing a digit.

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 as a sum of consecutive naturals, namely, 1062721160 + 1062721161.

It is an arithmetic number, because the mean of its divisors is an integer number (1062721161).

Almost surely, 2^2125442321 is an apocalyptic number.

It is an amenable number.

2125442321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125442321 is an equidigital number, since it uses as much as digits as its factorization.

2125442321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 26.

The square root of 2125442321 is about 46102.5196816833. The cubic root of 2125442321 is about 1285.7299916382.

Adding to 2125442321 its reverse (1232445212), we get a palindrome (3357887533).

The spelling of 2125442321 in words is "two billion, one hundred twenty-five million, four hundred forty-two thousand, three hundred twenty-one".