11123101321 has 2 divisors, whose sum is σ = 11123101322. Its totient is φ = 11123101320.

The previous prime is 11123101313. The next prime is 11123101333. The reversal of 11123101321 is 12310132111.

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., 10370367225 + 752734096 = 101835^2 + 27436^2 .

It is an emirp because it is prime and its reverse (12310132111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11123101321 - 2³ = 11123101313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11123101295 and 11123101304.

It is not a weakly prime, because it can be changed into another prime (11123101421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561550660 + 5561550661.

It is an arithmetic number, because the mean of its divisors is an integer number (5561550661).

Almost surely, 2^11123101321 is an apocalyptic number.

It is an amenable number.

11123101321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123101321 is an equidigital number, since it uses as much as digits as its factorization.

11123101321 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 11123101321 its reverse (12310132111), we get a palindrome (23433233432).

It can be divided in two parts, 11 and 123101321, that multiplied together give a palindrome (1354114531).

The spelling of 11123101321 in words is "eleven billion, one hundred twenty-three million, one hundred one thousand, three hundred twenty-one".