1110003121321 has 2 divisors, whose sum is σ = 1110003121322. Its totient is φ = 1110003121320.

The previous prime is 1110003121319. The next prime is 1110003121343. The reversal of 1110003121321 is 1231213000111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 570725855296 + 539277266025 = 755464^2 + 734355^2 .

It is an emirp because it is prime and its reverse (1231213000111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1110003121321 - 2¹ = 1110003121319 is a prime.

Together with 1110003121319, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1110003121295 and 1110003121304.

It is not a weakly prime, because it can be changed into another prime (1110003121351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555001560660 + 555001560661.

It is an arithmetic number, because the mean of its divisors is an integer number (555001560661).

Almost surely, 2^{1110003121321} is an apocalyptic number.

It is an amenable number.

1110003121321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110003121321 is an equidigital number, since it uses as much as digits as its factorization.

1110003121321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1110003121321 its reverse (1231213000111), we get a palindrome (2341216121432).

The spelling of 1110003121321 in words is "one trillion, one hundred ten billion, three million, one hundred twenty-one thousand, three hundred twenty-one".