1320213132 has 144 divisors (see below), whose sum is σ = 4147940160. Its totient is φ = 345378816.

The previous prime is 1320213101. The next prime is 1320213211. The reversal of 1320213132 is 2313120231.

1320213132 is a `hidden beast` number, since 1 + 320 + 213 + 132 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154344 + ... + 162672.

It is an arithmetic number, because the mean of its divisors is an integer number (28805140).

Almost surely, 2^1320213132 is an apocalyptic number.

1320213132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320213132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2073970080).

1320213132 is an abundant number, since it is smaller than the sum of its proper divisors (2827727028).

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

1320213132 is a wasteful number, since it uses less digits than its factorization.

1320213132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8400 (or 8395 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1320213132 is about 36334.7372633958. The cubic root of 1320213132 is about 1097.0203470966.

Adding to 1320213132 its reverse (2313120231), we get a palindrome (3633333363).

The spelling of 1320213132 in words is "one billion, three hundred twenty million, two hundred thirteen thousand, one hundred thirty-two".