10243660321 has 2 divisors, whose sum is σ = 10243660322. Its totient is φ = 10243660320.

The previous prime is 10243660307. The next prime is 10243660333. The reversal of 10243660321 is 12306634201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10233547921 + 10112400 = 101161^2 + 3180^2 .

It is a cyclic number.

It is not a de Polignac number, because 10243660321 - 2²¹ = 10241563169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10243660321.

It is not a weakly prime, because it can be changed into another prime (10243660381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5121830160 + 5121830161.

It is an arithmetic number, because the mean of its divisors is an integer number (5121830161).

Almost surely, 2^10243660321 is an apocalyptic number.

It is an amenable number.

10243660321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10243660321 is an equidigital number, since it uses as much as digits as its factorization.

10243660321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 10243660321 in words is "ten billion, two hundred forty-three million, six hundred sixty thousand, three hundred twenty-one".