1320021330 has 16 divisors (see below), whose sum is σ = 3168051264. Its totient is φ = 352005680.

The previous prime is 1320021301. The next prime is 1320021331. The reversal of 1320021330 is 331200231.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1320021331) 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, 22000326 + ... + 22000385.

It is an arithmetic number, because the mean of its divisors is an integer number (198003204).

Almost surely, 2^1320021330 is an apocalyptic number.

1320021330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320021330 is an abundant number, since it is smaller than the sum of its proper divisors (1848029934).

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

1320021330 is a wasteful number, since it uses less digits than its factorization.

1320021330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44000721.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1320021330 is about 36332.0977924479. The cubic root of 1320021330 is about 1096.9672190872.

Adding to 1320021330 its reverse (331200231), we get a palindrome (1651221561).

The spelling of 1320021330 in words is "one billion, three hundred twenty million, twenty-one thousand, three hundred thirty".