1320321003100 has 144 divisors (see below), whose sum is σ = 3240492595200. Its totient is φ = 462597408000.

The previous prime is 1320321003091. The next prime is 1320321003107. The reversal of 1320321003100 is 13001230231.

It is a super-2 number, since 2×1320321003100² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320321003107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7724361 + ... + 7893439.

It is an arithmetic number, because the mean of its divisors is an integer number (22503420800).

Almost surely, 2^{1320321003100} is an apocalyptic number.

1320321003100 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 1320321003100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620246297600).

1320321003100 is an abundant number, since it is smaller than the sum of its proper divisors (1920171592100).

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

1320321003100 is a wasteful number, since it uses less digits than its factorization.

1320321003100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169364 (or 169357 counting only the distinct ones).

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

Adding to 1320321003100 its reverse (13001230231), we get a palindrome (1333322233331).

The spelling of 1320321003100 in words is "one trillion, three hundred twenty billion, three hundred twenty-one million, three thousand, one hundred".