1321123003 has 2 divisors, whose sum is σ = 1321123004. Its totient is φ = 1321123002.

The previous prime is 1321122947. The next prime is 1321123039. The reversal of 1321123003 is 3003211231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321123003 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321123093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660561501 + 660561502.

It is an arithmetic number, because the mean of its divisors is an integer number (660561502).

Almost surely, 2^1321123003 is an apocalyptic number.

1321123003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321123003 is an equidigital number, since it uses as much as digits as its factorization.

1321123003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1321123003 is about 36347.2557836214. The cubic root of 1321123003 is about 1097.2723058552.

Adding to 1321123003 its reverse (3003211231), we get a palindrome (4324334234).

The spelling of 1321123003 in words is "one billion, three hundred twenty-one million, one hundred twenty-three thousand, three".