1311011003 has 2 divisors, whose sum is σ = 1311011004. Its totient is φ = 1311011002.

The previous prime is 1311010999. The next prime is 1311011069. The reversal of 1311011003 is 3001101131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311011003 - 2² = 1311010999 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311011503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655505501 + 655505502.

It is an arithmetic number, because the mean of its divisors is an integer number (655505502).

Almost surely, 2^1311011003 is an apocalyptic number.

1311011003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311011003 is an equidigital number, since it uses as much as digits as its factorization.

1311011003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 1311011003 is about 36207.8859228207. The cubic root of 1311011003 is about 1094.4655907867.

Adding to 1311011003 its reverse (3001101131), we get a palindrome (4312112134).

The spelling of 1311011003 in words is "one billion, three hundred eleven million, eleven thousand, three".