1320221003 has 4 divisors (see below), whose sum is σ = 1397881080. Its totient is φ = 1242560928.

The previous prime is 1320220981. The next prime is 1320221011. The reversal of 1320221003 is 3001220231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3001220231 = 4673 ⋅642247.

It is a cyclic number.

It is not a de Polignac number, because 1320221003 - 2⁸ = 1320220747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320221053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38830013 + ... + 38830046.

It is an arithmetic number, because the mean of its divisors is an integer number (349470270).

Almost surely, 2^1320221003 is an apocalyptic number.

1320221003 is a deficient number, since it is larger than the sum of its proper divisors (77660077).

1320221003 is an equidigital number, since it uses as much as digits as its factorization.

1320221003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77660076.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1320221003 is about 36334.8455755629. The cubic root of 1320221003 is about 1097.0225272067.

Adding to 1320221003 its reverse (3001220231), we get a palindrome (4321441234).

The spelling of 1320221003 in words is "one billion, three hundred twenty million, two hundred twenty-one thousand, three".