11301131221 has 2 divisors, whose sum is σ = 11301131222. Its totient is φ = 11301131220.

The previous prime is 11301131207. The next prime is 11301131311. The reversal of 11301131221 is 12213110311.

It is a happy number.

11301131221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9890302500 + 1410828721 = 99450^2 + 37561^2 .

It is an emirp because it is prime and its reverse (12213110311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11301131221 - 2²¹ = 11299034069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11301131195 and 11301131204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11301171221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5650565610 + 5650565611.

It is an arithmetic number, because the mean of its divisors is an integer number (5650565611).

Almost surely, 2^11301131221 is an apocalyptic number.

It is an amenable number.

11301131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11301131221 is an equidigital number, since it uses as much as digits as its factorization.

11301131221 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 11301131221 its reverse (12213110311), we get a palindrome (23514241532).

The spelling of 11301131221 in words is "eleven billion, three hundred one million, one hundred thirty-one thousand, two hundred twenty-one".