1320312100 has 36 divisors (see below), whose sum is σ = 2867816448. Its totient is φ = 527620000.

The previous prime is 1320312083. The next prime is 1320312101. The reversal of 1320312100 is 12130231.

It is not an unprimeable number, because it can be changed into a prime (1320312101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109365 + ... + 120835.

It is an arithmetic number, because the mean of its divisors is an integer number (79661568).

Almost surely, 2^1320312100 is an apocalyptic number.

1320312100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320312100 is an abundant number, since it is smaller than the sum of its proper divisors (1547504348).

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

1320312100 is a wasteful number, since it uses less digits than its factorization.

1320312100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12636 (or 12629 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1320312100 is about 36336.0991302038. The cubic root of 1320312100 is about 1097.0477586294.

Adding to 1320312100 its reverse (12130231), we get a palindrome (1332442331).

The spelling of 1320312100 in words is "one billion, three hundred twenty million, three hundred twelve thousand, one hundred".