1311103103 has 4 divisors (see below), whose sum is σ = 1346538360. Its totient is φ = 1275667848.

The previous prime is 1311103097. The next prime is 1311103127. The reversal of 1311103103 is 3013011131.

It is a happy number.

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 1311103103 - 2¹⁸ = 1310840959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311103603) 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, 17717573 + ... + 17717646.

It is an arithmetic number, because the mean of its divisors is an integer number (336634590).

Almost surely, 2^1311103103 is an apocalyptic number.

1311103103 is a deficient number, since it is larger than the sum of its proper divisors (35435257).

1311103103 is an equidigital number, since it uses as much as digits as its factorization.

1311103103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35435256.

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 1311103103 is about 36209.1577228745. The cubic root of 1311103103 is about 1094.4912193335.

Adding to 1311103103 its reverse (3013011131), we get a palindrome (4324114234).

The spelling of 1311103103 in words is "one billion, three hundred eleven million, one hundred three thousand, one hundred three".