11320321021 has 2 divisors, whose sum is σ = 11320321022. Its totient is φ = 11320321020.

The previous prime is 11320321007. The next prime is 11320321081. The reversal of 11320321021 is 12012302311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11260180996 + 60140025 = 106114^2 + 7755^2 .

It is an emirp because it is prime and its reverse (12012302311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11320321021 - 2⁵ = 11320320989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11320320986 and 11320321004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11320321081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660160510 + 5660160511.

It is an arithmetic number, because the mean of its divisors is an integer number (5660160511).

Almost surely, 2^11320321021 is an apocalyptic number.

It is an amenable number.

11320321021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11320321021 is an equidigital number, since it uses as much as digits as its factorization.

11320321021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11320321021 its reverse (12012302311), we get a palindrome (23332623332).

The spelling of 11320321021 in words is "eleven billion, three hundred twenty million, three hundred twenty-one thousand, twenty-one".