1320213312 has 84 divisors (see below), whose sum is σ = 4128186816. Its totient is φ = 400062720.

The previous prime is 1320213289. The next prime is 1320213329. The reversal of 1320213312 is 2133120231.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97848 + ... + 110519.

Almost surely, 2^1320213312 is an apocalyptic number.

1320213312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1320213312 is an abundant number, since it is smaller than the sum of its proper divisors (2807973504).

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

1320213312 is a wasteful number, since it uses less digits than its factorization.

1320213312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208396 (or 208383 counting only the distinct ones).

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

The square root of 1320213312 is about 36334.7397403642. The cubic root of 1320213312 is about 1097.0203969531.

Adding to 1320213312 its reverse (2133120231), we get a palindrome (3453333543).

The spelling of 1320213312 in words is "one billion, three hundred twenty million, two hundred thirteen thousand, three hundred twelve".