1321332100 has 54 divisors (see below), whose sum is σ = 3151678922. Its totient is φ = 480480000.

The previous prime is 1321332091. The next prime is 1321332119. The reversal of 1321332100 is 12331231.

It can be written as a sum of positive squares in 3 ways, for example, as 245360896 + 1075971204 = 15664^2 + 32802^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 42501 + ... + 66700.

Almost surely, 2^1321332100 is an apocalyptic number.

1321332100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321332100 is an abundant number, since it is smaller than the sum of its proper divisors (1830346822).

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

1321332100 is a wasteful number, since it uses less digits than its factorization.

1321332100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109237 (or 109219 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1321332100 is about 36350.1320492787. The cubic root of 1321332100 is about 1097.3301920231.

Adding to 1321332100 its reverse (12331231), we get a palindrome (1333663331).

The spelling of 1321332100 in words is "one billion, three hundred twenty-one million, three hundred thirty-two thousand, one hundred".