1321313033 has 2 divisors, whose sum is σ = 1321313034. Its totient is φ = 1321313032.

The previous prime is 1321312997. The next prime is 1321313041. The reversal of 1321313033 is 3303131231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1266434569 + 54878464 = 35587^2 + 7408^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321313033 - 2¹⁰ = 1321312009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321312996 and 1321313014.

It is not a weakly prime, because it can be changed into another prime (1321310033) 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, 660656516 + 660656517.

It is an arithmetic number, because the mean of its divisors is an integer number (660656517).

Almost surely, 2^1321313033 is an apocalyptic number.

It is an amenable number.

1321313033 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321313033 is an equidigital number, since it uses as much as digits as its factorization.

1321313033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1321313033 is about 36349.8697796842. The cubic root of 1321313033 is about 1097.3249137902.

Adding to 1321313033 its reverse (3303131231), we get a palindrome (4624444264).

The spelling of 1321313033 in words is "one billion, three hundred twenty-one million, three hundred thirteen thousand, thirty-three".