1311102320 has 40 divisors (see below), whose sum is σ = 3325434480. Its totient is φ = 476764160.

The previous prime is 1311102301. The next prime is 1311102329. The reversal of 1311102320 is 232011131.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1311102295 and 1311102304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311102329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744065 + ... + 745824.

It is an arithmetic number, because the mean of its divisors is an integer number (83135862).

Almost surely, 2^1311102320 is an apocalyptic number.

1311102320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311102320 is an abundant number, since it is smaller than the sum of its proper divisors (2014332160).

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

1311102320 is a wasteful number, since it uses less digits than its factorization.

1311102320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489913 (or 1489907 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1311102320 is about 36209.1469106910. The cubic root of 1311102320 is about 1094.4910014541.

Adding to 1311102320 its reverse (232011131), we get a palindrome (1543113451).

The spelling of 1311102320 in words is "one billion, three hundred eleven million, one hundred two thousand, three hundred twenty".