1320012321 has 8 divisors (see below), whose sum is σ = 1766560320. Its totient is φ = 876736272.

The previous prime is 1320012319. The next prime is 1320012349. The reversal of 1320012321 is 1232100231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1320012321 - 2¹ = 1320012319 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320012321.

It is not an unprimeable number, because it can be changed into a prime (1320012301) 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, 817045 + ... + 818658.

It is an arithmetic number, because the mean of its divisors is an integer number (220820040).

Almost surely, 2^1320012321 is an apocalyptic number.

It is an amenable number.

1320012321 is a deficient number, since it is larger than the sum of its proper divisors (446547999).

1320012321 is a wasteful number, since it uses less digits than its factorization.

1320012321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635975.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1320012321 is about 36331.9738109561. The cubic root of 1320012321 is about 1096.9647235214.

Adding to 1320012321 its reverse (1232100231), we get a palindrome (2552112552).

The spelling of 1320012321 in words is "one billion, three hundred twenty million, twelve thousand, three hundred twenty-one".