1321330600 has 24 divisors (see below), whose sum is σ = 3072094110. Its totient is φ = 528532160.

The previous prime is 1321330597. The next prime is 1321330603. The reversal of 1321330600 is 60331231.

It is an interprime number because it is at equal distance from previous prime (1321330597) and next prime (1321330603).

It can be written as a sum of positive squares in 3 ways, for example, as 478821924 + 842508676 = 21882^2 + 29026^2 .

It is not an unprimeable number, because it can be changed into a prime (1321330603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3303127 + ... + 3303526.

Almost surely, 2^1321330600 is an apocalyptic number.

1321330600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321330600 is an abundant number, since it is smaller than the sum of its proper divisors (1750763510).

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

1321330600 is a wasteful number, since it uses less digits than its factorization.

1321330600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6606669 (or 6606660 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1321330600 is about 36350.1114166105. Note that the first 3 decimals coincide. The cubic root of 1321330600 is about 1097.3297767866.

Adding to 1321330600 its reverse (60331231), we get a palindrome (1381661831).

The spelling of 1321330600 in words is "one billion, three hundred twenty-one million, three hundred thirty thousand, six hundred".