1131266321 has 2 divisors, whose sum is σ = 1131266322. Its totient is φ = 1131266320.

The previous prime is 1131266299. The next prime is 1131266341. The reversal of 1131266321 is 1236621311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 826275025 + 304991296 = 28745^2 + 17464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131266321 - 2¹⁴ = 1131249937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131266341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565633160 + 565633161.

It is an arithmetic number, because the mean of its divisors is an integer number (565633161).

Almost surely, 2^1131266321 is an apocalyptic number.

It is an amenable number.

1131266321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131266321 is an equidigital number, since it uses as much as digits as its factorization.

1131266321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 1131266321 is about 33634.3027428844. The cubic root of 1131266321 is about 1041.9693702828.

Adding to 1131266321 its reverse (1236621311), we get a palindrome (2367887632).

The spelling of 1131266321 in words is "one billion, one hundred thirty-one million, two hundred sixty-six thousand, three hundred twenty-one".