1321233163 has 2 divisors, whose sum is σ = 1321233164. Its totient is φ = 1321233162.

The previous prime is 1321233161. The next prime is 1321233167. The reversal of 1321233163 is 3613321231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321233163 - 2¹ = 1321233161 is a prime.

Together with 1321233161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1321233161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660616581 + 660616582.

It is an arithmetic number, because the mean of its divisors is an integer number (660616582).

Almost surely, 2^1321233163 is an apocalyptic number.

1321233163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321233163 is an equidigital number, since it uses as much as digits as its factorization.

1321233163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 25.

The square root of 1321233163 is about 36348.7711346615. The cubic root of 1321233163 is about 1097.3028031814.

Adding to 1321233163 its reverse (3613321231), we get a palindrome (4934554394).

The spelling of 1321233163 in words is "one billion, three hundred twenty-one million, two hundred thirty-three thousand, one hundred sixty-three".