1163065021 has 2 divisors, whose sum is σ = 1163065022. Its totient is φ = 1163065020.

The previous prime is 1163065009. The next prime is 1163065073. The reversal of 1163065021 is 1205603611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 986839396 + 176225625 = 31414^2 + 13275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1163065021 - 2⁷ = 1163064893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1163065091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581532510 + 581532511.

It is an arithmetic number, because the mean of its divisors is an integer number (581532511).

Almost surely, 2^1163065021 is an apocalyptic number.

It is an amenable number.

1163065021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163065021 is an equidigital number, since it uses as much as digits as its factorization.

1163065021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1163065021 is about 34103.7391058517. The cubic root of 1163065021 is about 1051.6421834488.

Adding to 1163065021 its reverse (1205603611), we get a palindrome (2368668632).

The spelling of 1163065021 in words is "one billion, one hundred sixty-three million, sixty-five thousand, twenty-one".