1131211322321 has 2 divisors, whose sum is σ = 1131211322322. Its totient is φ = 1131211322320.

The previous prime is 1131211322261. The next prime is 1131211322387. The reversal of 1131211322321 is 1232231121311.

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., 1023931491025 + 107279831296 = 1011895^2 + 327536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131211322321 - 2²² = 1131207128017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131211322221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565605661160 + 565605661161.

It is an arithmetic number, because the mean of its divisors is an integer number (565605661161).

Almost surely, 2^{1131211322321} is an apocalyptic number.

It is an amenable number.

1131211322321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131211322321 is an equidigital number, since it uses as much as digits as its factorization.

1131211322321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

Adding to 1131211322321 its reverse (1232231121311), we get a palindrome (2363442443632).

The spelling of 1131211322321 in words is "one trillion, one hundred thirty-one billion, two hundred eleven million, three hundred twenty-two thousand, three hundred twenty-one".