1320203312 has 40 divisors (see below), whose sum is σ = 2701327104. Its totient is φ = 623779904.

The previous prime is 1320203281. The next prime is 1320203359. The reversal of 1320203312 is 2133020231.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8933 + ... + 52155.

Almost surely, 2^1320203312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320203312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1350663552).

1320203312 is an abundant number, since it is smaller than the sum of its proper divisors (1381123792).

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

1320203312 is a wasteful number, since it uses less digits than its factorization.

1320203312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43337 (or 43331 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1320203312 is about 36334.6021307513. The cubic root of 1320203312 is about 1097.0176271402.

Adding to 1320203312 its reverse (2133020231), we get a palindrome (3453223543).

The spelling of 1320203312 in words is "one billion, three hundred twenty million, two hundred three thousand, three hundred twelve".