1321616033 has 2 divisors, whose sum is σ = 1321616034. Its totient is φ = 1321616032.

The previous prime is 1321615993. The next prime is 1321616053. The reversal of 1321616033 is 3306161231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 745999969 + 575616064 = 27313^2 + 23992^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321616033 - 2¹⁴ = 1321599649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321615993 and 1321616011.

It is not a weakly prime, because it can be changed into another prime (1321616053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660808016 + 660808017.

It is an arithmetic number, because the mean of its divisors is an integer number (660808017).

Almost surely, 2^1321616033 is an apocalyptic number.

It is an amenable number.

1321616033 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321616033 is an equidigital number, since it uses as much as digits as its factorization.

1321616033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1321616033 is about 36354.0373686335. The cubic root of 1321616033 is about 1097.4087859257.

Adding to 1321616033 its reverse (3306161231), we get a palindrome (4627777264).

The spelling of 1321616033 in words is "one billion, three hundred twenty-one million, six hundred sixteen thousand, thirty-three".