11111107321 has 2 divisors, whose sum is σ = 11111107322. Its totient is φ = 11111107320.

The previous prime is 11111107247. The next prime is 11111107349. The reversal of 11111107321 is 12370111111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10787107321 + 324000000 = 103861^2 + 18000^2 .

It is an emirp because it is prime and its reverse (12370111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111107321 - 2⁷ = 11111107193 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111107921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555553660 + 5555553661.

It is an arithmetic number, because the mean of its divisors is an integer number (5555553661).

Almost surely, 2^11111107321 is an apocalyptic number.

It is an amenable number.

11111107321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111107321 is an equidigital number, since it uses as much as digits as its factorization.

11111107321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42, while the sum is 19.

Adding to 11111107321 its reverse (12370111111), we get a palindrome (23481218432).

The spelling of 11111107321 in words is "eleven billion, one hundred eleven million, one hundred seven thousand, three hundred twenty-one".