1321120200321 has 12 divisors (see below), whose sum is σ = 1909622022672. Its totient is φ = 880129589976.

The previous prime is 1321120200311. The next prime is 1321120200359. The reversal of 1321120200321 is 1230020211231.

1321120200321 is a `hidden beast` number, since 1 + 3 + 21 + 120 + 200 + 321 = 666.

It is not a de Polignac number, because 1321120200321 - 2⁵ = 1321120200289 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1321120200294 and 1321120200303.

It is not an unprimeable number, because it can be changed into a prime (1321120200311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51420631 + ... + 51446316.

It is an arithmetic number, because the mean of its divisors is an integer number (159135168556).

Almost surely, 2^{1321120200321} is an apocalyptic number.

It is an amenable number.

1321120200321 is a deficient number, since it is larger than the sum of its proper divisors (588501822351).

1321120200321 is a wasteful number, since it uses less digits than its factorization.

1321120200321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102868380 (or 102868377 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1321120200321 its reverse (1230020211231), we get a palindrome (2551140411552).

The spelling of 1321120200321 in words is "one trillion, three hundred twenty-one billion, one hundred twenty million, two hundred thousand, three hundred twenty-one".