1321002233 has 4 divisors (see below), whose sum is σ = 1339098228. Its totient is φ = 1302906240.

The previous prime is 1321002191. The next prime is 1321002251. The reversal of 1321002233 is 3322001231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3322001231 = 467 ⋅7113493.

It can be written as a sum of positive squares in 2 ways, for example, as 937155769 + 383846464 = 30613^2 + 19592^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321002233 - 2¹⁶ = 1320936697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321005233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9047888 + ... + 9048033.

It is an arithmetic number, because the mean of its divisors is an integer number (334774557).

Almost surely, 2^1321002233 is an apocalyptic number.

It is an amenable number.

1321002233 is a deficient number, since it is larger than the sum of its proper divisors (18095995).

1321002233 is an equidigital number, since it uses as much as digits as its factorization.

1321002233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18095994.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1321002233 is about 36345.5944097768. The cubic root of 1321002233 is about 1097.2388692475.

Adding to 1321002233 its reverse (3322001231), we get a palindrome (4643003464).

The spelling of 1321002233 in words is "one billion, three hundred twenty-one million, two thousand, two hundred thirty-three".