1131230123321 has 2 divisors, whose sum is σ = 1131230123322. Its totient is φ = 1131230123320.

The previous prime is 1131230123291. The next prime is 1131230123357. The reversal of 1131230123321 is 1233210321311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1125001756921 + 6228366400 = 1060661^2 + 78920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131230123321 - 2³⁴ = 1114050254137 is a prime.

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 (1131230123521) 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, 565615061660 + 565615061661.

It is an arithmetic number, because the mean of its divisors is an integer number (565615061661).

Almost surely, 2^{1131230123321} is an apocalyptic number.

It is an amenable number.

1131230123321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131230123321 is an equidigital number, since it uses as much as digits as its factorization.

1131230123321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1131230123321 its reverse (1233210321311), we get a palindrome (2364440444632).

The spelling of 1131230123321 in words is "one trillion, one hundred thirty-one billion, two hundred thirty million, one hundred twenty-three thousand, three hundred twenty-one".