1320201320 has 64 divisors (see below), whose sum is σ = 3164616000. Its totient is φ = 494235648.

The previous prime is 1320201313. The next prime is 1320201373. The reversal of 1320201320 is 231020231.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1320201295 and 1320201304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52616 + ... + 73544.

It is an arithmetic number, because the mean of its divisors is an integer number (49447125).

Almost surely, 2^1320201320 is an apocalyptic number.

1320201320 is a gapful number since it is divisible by the number (10) 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 1320201320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1582308000).

1320201320 is an abundant number, since it is smaller than the sum of its proper divisors (1844414680).

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

1320201320 is a wasteful number, since it uses less digits than its factorization.

1320201320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21042 (or 21038 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1320201320 is about 36334.5747188542. The cubic root of 1320201320 is about 1097.0170753918.

Adding to 1320201320 its reverse (231020231), we get a palindrome (1551221551).

The spelling of 1320201320 in words is "one billion, three hundred twenty million, two hundred one thousand, three hundred twenty".