11321730281 has 2 divisors, whose sum is σ = 11321730282. Its totient is φ = 11321730280.

The previous prime is 11321730271. The next prime is 11321730323. The reversal of 11321730281 is 18203712311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10916070400 + 405659881 = 104480^2 + 20141^2 .

It is a cyclic number.

It is not a de Polignac number, because 11321730281 - 2¹⁰ = 11321729257 is a prime.

It is a super-2 number, since 2×11321730281² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11321730271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660865140 + 5660865141.

It is an arithmetic number, because the mean of its divisors is an integer number (5660865141).

Almost surely, 2^11321730281 is an apocalyptic number.

It is an amenable number.

11321730281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321730281 is an equidigital number, since it uses as much as digits as its factorization.

11321730281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 11321730281 in words is "eleven billion, three hundred twenty-one million, seven hundred thirty thousand, two hundred eighty-one".