1311100003 has 4 divisors (see below), whose sum is σ = 1313178448. Its totient is φ = 1309021560.

The previous prime is 1311099991. The next prime is 1311100013. The reversal of 1311100003 is 3000011131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311100003 - 2¹⁷ = 1310968931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311100013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1038276 + ... + 1039537.

It is an arithmetic number, because the mean of its divisors is an integer number (328294612).

Almost surely, 2^1311100003 is an apocalyptic number.

1311100003 is a deficient number, since it is larger than the sum of its proper divisors (2078445).

1311100003 is an equidigital number, since it uses as much as digits as its factorization.

1311100003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078444.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 1311100003 is about 36209.1149159987. The cubic root of 1311100003 is about 1094.4903567200.

Adding to 1311100003 its reverse (3000011131), we get a palindrome (4311111134).

The spelling of 1311100003 in words is "one billion, three hundred eleven million, one hundred thousand, three".