1131321403361 has 2 divisors, whose sum is σ = 1131321403362. Its totient is φ = 1131321403360.

The previous prime is 1131321403351. The next prime is 1131321403417. The reversal of 1131321403361 is 1633041231311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 777571240000 + 353750163361 = 881800^2 + 594769^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131321403361 - 2²⁶ = 1131254294497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131321403351) 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, 565660701680 + 565660701681.

It is an arithmetic number, because the mean of its divisors is an integer number (565660701681).

Almost surely, 2^{1131321403361} is an apocalyptic number.

It is an amenable number.

1131321403361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131321403361 is an equidigital number, since it uses as much as digits as its factorization.

1131321403361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 1131321403361 its reverse (1633041231311), we get a palindrome (2764362634672).

The spelling of 1131321403361 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-one million, four hundred three thousand, three hundred sixty-one".