1311103100 has 36 divisors (see below), whose sum is σ = 2871706824. Its totient is φ = 519535680.

The previous prime is 1311103097. The next prime is 1311103127. The reversal of 1311103100 is 13011131.

It is a happy number.

It is a super-2 number, since 2×1311103100² = 3437982677659220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50567 + ... + 71966.

It is an arithmetic number, because the mean of its divisors is an integer number (79769634).

Almost surely, 2^1311103100 is an apocalyptic number.

1311103100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311103100 is an abundant number, since it is smaller than the sum of its proper divisors (1560603724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311103100 is a wasteful number, since it uses less digits than its factorization.

1311103100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122654 (or 122647 counting only the distinct ones).

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

The square root of 1311103100 is about 36209.1576814485. The cubic root of 1311103100 is about 1094.4912184987.

Adding to 1311103100 its reverse (13011131), we get a palindrome (1324114231).

The spelling of 1311103100 in words is "one billion, three hundred eleven million, one hundred three thousand, one hundred".