11131120321 has 2 divisors, whose sum is σ = 11131120322. Its totient is φ = 11131120320.

The previous prime is 11131120279. The next prime is 11131120331. The reversal of 11131120321 is 12302113111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6789760000 + 4341360321 = 82400^2 + 65889^2 .

It is an emirp because it is prime and its reverse (12302113111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11131120321 - 2⁷ = 11131120193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11131120295 and 11131120304.

It is not a weakly prime, because it can be changed into another prime (11131120331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565560160 + 5565560161.

It is an arithmetic number, because the mean of its divisors is an integer number (5565560161).

Almost surely, 2^11131120321 is an apocalyptic number.

It is an amenable number.

11131120321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131120321 is an equidigital number, since it uses as much as digits as its factorization.

11131120321 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11131120321 its reverse (12302113111), we get a palindrome (23433233432).

The spelling of 11131120321 in words is "eleven billion, one hundred thirty-one million, one hundred twenty thousand, three hundred twenty-one".