1320221330 has 16 divisors (see below), whose sum is σ = 2381894424. Its totient is φ = 526867200.

The previous prime is 1320221311. The next prime is 1320221333. The reversal of 1320221330 is 331220231.

It can be written as a sum of positive squares in 4 ways, for example, as 1136970961 + 183250369 = 33719^2 + 13537^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1320221299 and 1320221308.

It is not an unprimeable number, because it can be changed into a prime (1320221333) 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, 148121 + ... + 156780.

Almost surely, 2^1320221330 is an apocalyptic number.

1320221330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320221330 is a deficient number, since it is larger than the sum of its proper divisors (1061673094).

1320221330 is a wasteful number, since it uses less digits than its factorization.

1320221330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305341.

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

The square root of 1320221330 is about 36334.8500753753. The cubic root of 1320221330 is about 1097.0226177790.

Adding to 1320221330 its reverse (331220231), we get a palindrome (1651441561).

The spelling of 1320221330 in words is "one billion, three hundred twenty million, two hundred twenty-one thousand, three hundred thirty".