1263140360221 has 2 divisors, whose sum is σ = 1263140360222. Its totient is φ = 1263140360220.

The previous prime is 1263140360201. The next prime is 1263140360269. The reversal of 1263140360221 is 1220630413621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998378657721 + 264761702500 = 999189^2 + 514550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263140360221 - 2⁹ = 1263140359709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263140360201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631570180110 + 631570180111.

It is an arithmetic number, because the mean of its divisors is an integer number (631570180111).

Almost surely, 2^{1263140360221} is an apocalyptic number.

It is an amenable number.

1263140360221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263140360221 is an equidigital number, since it uses as much as digits as its factorization.

1263140360221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 1263140360221 its reverse (1220630413621), we get a palindrome (2483770773842).

The spelling of 1263140360221 in words is "one trillion, two hundred sixty-three billion, one hundred forty million, three hundred sixty thousand, two hundred twenty-one".