1321331130 has 160 divisors (see below), whose sum is σ = 4077634176. Its totient is φ = 300744576.

The previous prime is 1321331111. The next prime is 1321331159. The reversal of 1321331130 is 311331231.

It is a happy number.

1321331130 is a `hidden beast` number, since 1 + 321 + 3 + 311 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 2250697 + ... + 2251283.

Almost surely, 2^1321331130 is an apocalyptic number.

1321331130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321331130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2038817088).

1321331130 is an abundant number, since it is smaller than the sum of its proper divisors (2756303046).

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

1321331130 is a wasteful number, since it uses less digits than its factorization.

1321331130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1321331130 is about 36350.1187068213. The cubic root of 1321331130 is about 1097.3299235035.

Adding to 1321331130 its reverse (311331231), we get a palindrome (1632662361).

The spelling of 1321331130 in words is "one billion, three hundred twenty-one million, three hundred thirty-one thousand, one hundred thirty".