1231011163 has 2 divisors, whose sum is σ = 1231011164. Its totient is φ = 1231011162.

The previous prime is 1231011161. The next prime is 1231011211. The reversal of 1231011163 is 3611101321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231011163 - 2¹ = 1231011161 is a prime.

It is a super-2 number, since 2×1231011163² = 3030776966861225138, which contains 22 as substring.

Together with 1231011161, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1231011163.

It is not a weakly prime, because it can be changed into another prime (1231011161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615505581 + 615505582.

It is an arithmetic number, because the mean of its divisors is an integer number (615505582).

Almost surely, 2^1231011163 is an apocalyptic number.

1231011163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231011163 is an equidigital number, since it uses as much as digits as its factorization.

1231011163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1231011163 is about 35085.7686676521. The cubic root of 1231011163 is about 1071.7347940869.

Adding to 1231011163 its reverse (3611101321), we get a palindrome (4842112484).

The spelling of 1231011163 in words is "one billion, two hundred thirty-one million, eleven thousand, one hundred sixty-three".