1210321100320 has 24 divisors (see below), whose sum is σ = 2859383599884. Its totient is φ = 484128440064.

The previous prime is 1210321100311. The next prime is 1210321100321. The reversal of 1210321100320 is 230011230121.

It can be written as a sum of positive squares in 2 ways, for example, as 1189294940304 + 21026160016 = 1090548^2 + 145004^2 .

It is a super-4 number, since 4×1210321100320⁴ (a number of 49 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1210321100294 and 1210321100303.

It is not an unprimeable number, because it can be changed into a prime (1210321100321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3782253279 + ... + 3782253598.

Almost surely, 2^{1210321100320} is an apocalyptic number.

1210321100320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210321100320 is an abundant number, since it is smaller than the sum of its proper divisors (1649062499564).

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

1210321100320 is an equidigital number, since it uses as much as digits as its factorization.

1210321100320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7564506892 (or 7564506884 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1210321100320 its reverse (230011230121), we get a palindrome (1440332330441).

The spelling of 1210321100320 in words is "one trillion, two hundred ten billion, three hundred twenty-one million, one hundred thousand, three hundred twenty".