1311011103 has 4 divisors (see below), whose sum is σ = 1748014808. Its totient is φ = 874007400.

The previous prime is 1311011101. The next prime is 1311011113. The reversal of 1311011103 is 3011101131.

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

It is not a de Polignac number, because 1311011103 - 2¹ = 1311011101 is a prime.

It is a super-2 number, since 2×1311011103² = 3437500224378553218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311011101) 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, 218501848 + ... + 218501853.

It is an arithmetic number, because the mean of its divisors is an integer number (437003702).

Almost surely, 2^1311011103 is an apocalyptic number.

1311011103 is a deficient number, since it is larger than the sum of its proper divisors (437003705).

1311011103 is an equidigital number, since it uses as much as digits as its factorization.

1311011103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437003704.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 1311011103 is about 36207.8873037354. The cubic root of 1311011103 is about 1094.4656186142.

Adding to 1311011103 its reverse (3011101131), we get a palindrome (4322112234).

The spelling of 1311011103 in words is "one billion, three hundred eleven million, eleven thousand, one hundred three".