11011321 has 2 divisors, whose sum is σ = 11011322. Its totient is φ = 11011320.

The previous prime is 11011307. The next prime is 11011331. The reversal of 11011321 is 12311011.

It is an a-pointer prime, because the next prime (11011331) can be obtained adding 11011321 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5812921 + 5198400 = 2411^2 + 2280^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011321 - 2⁷ = 11011193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11011298 and 11011307.

It is not a weakly prime, because it can be changed into another prime (11011331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505660 + 5505661.

It is an arithmetic number, because the mean of its divisors is an integer number (5505661).

Almost surely, 2^11011321 is an apocalyptic number.

It is an amenable number.

11011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011321 is an equidigital number, since it uses as much as digits as its factorization.

11011321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 11011321 is about 3318.3310564198. The cubic root of 11011321 is about 222.4742788935.

Adding to 11011321 its reverse (12311011), we get a palindrome (23322332).

The spelling of 11011321 in words is "eleven million, eleven thousand, three hundred twenty-one".