11302321561 has 2 divisors, whose sum is σ = 11302321562. Its totient is φ = 11302321560.

The previous prime is 11302321523. The next prime is 11302321571. The reversal of 11302321561 is 16512320311.

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., 10609000000 + 693321561 = 103000^2 + 26331^2 .

It is a cyclic number.

It is not a de Polignac number, because 11302321561 - 2¹⁵ = 11302288793 is a prime.

It is not a weakly prime, because it can be changed into another prime (11302321501) 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, 5651160780 + 5651160781.

It is an arithmetic number, because the mean of its divisors is an integer number (5651160781).

Almost surely, 2^11302321561 is an apocalyptic number.

It is an amenable number.

11302321561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11302321561 is an equidigital number, since it uses as much as digits as its factorization.

11302321561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 11302321561 its reverse (16512320311), we get a palindrome (27814641872).

The spelling of 11302321561 in words is "eleven billion, three hundred two million, three hundred twenty-one thousand, five hundred sixty-one".