11321222001521 has 2 divisors, whose sum is σ = 11321222001522. Its totient is φ = 11321222001520.

The previous prime is 11321222001491. The next prime is 11321222001533. The reversal of 11321222001521 is 12510022212311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10044240640225 + 1276981361296 = 3169265^2 + 1130036^2 .

It is a cyclic number.

It is not a de Polignac number, because 11321222001521 - 2²² = 11321217807217 is a prime.

It is not a weakly prime, because it can be changed into another prime (11321222001821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660611000760 + 5660611000761.

It is an arithmetic number, because the mean of its divisors is an integer number (5660611000761).

Almost surely, 2^{11321222001521} is an apocalyptic number.

It is an amenable number.

11321222001521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321222001521 is an equidigital number, since it uses as much as digits as its factorization.

11321222001521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 11321222001521 its reverse (12510022212311), we get a palindrome (23831244213832).

The spelling of 11321222001521 in words is "eleven trillion, three hundred twenty-one billion, two hundred twenty-two million, one thousand, five hundred twenty-one".