1312311100 has 18 divisors (see below), whose sum is σ = 2847715304. Its totient is φ = 524924400.

The previous prime is 1312311097. The next prime is 1312311101. The reversal of 1312311100 is 11132131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312311101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6561456 + ... + 6561655.

Almost surely, 2^1312311100 is an apocalyptic number.

1312311100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312311100 is an abundant number, since it is smaller than the sum of its proper divisors (1535404204).

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

1312311100 is a wasteful number, since it uses less digits than its factorization.

1312311100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13123125 (or 13123118 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1312311100 is about 36225.8347039789. The cubic root of 1312311100 is about 1094.8272560286.

Adding to 1312311100 its reverse (11132131), we get a palindrome (1323443231).

The spelling of 1312311100 in words is "one billion, three hundred twelve million, three hundred eleven thousand, one hundred".