1320031100 has 18 divisors (see below), whose sum is σ = 2864467704. Its totient is φ = 528012400.

The previous prime is 1320031067. The next prime is 1320031109. The reversal of 1320031100 is 11300231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320031109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6600056 + ... + 6600255.

Almost surely, 2^1320031100 is an apocalyptic number.

1320031100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320031100 is an abundant number, since it is smaller than the sum of its proper divisors (1544436604).

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

1320031100 is a wasteful number, since it uses less digits than its factorization.

1320031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200325 (or 13200318 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1320031100 is about 36332.2322463126. The cubic root of 1320031100 is about 1096.9699254433.

Adding to 1320031100 its reverse (11300231), we get a palindrome (1331331331).

The spelling of 1320031100 in words is "one billion, three hundred twenty million, thirty-one thousand, one hundred".