11285911021321 has 2 divisors, whose sum is σ = 11285911021322. Its totient is φ = 11285911021320.

The previous prime is 11285911021277. The next prime is 11285911021369. The reversal of 11285911021321 is 12312011958211.

11285911021321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7229457225225 + 4056453796096 = 2688765^2 + 2014064^2 .

It is a cyclic number.

It is not a de Polignac number, because 11285911021321 - 2²⁹ = 11285374150409 is a prime.

It is not a weakly prime, because it can be changed into another prime (11285911021391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5642955510660 + 5642955510661.

It is an arithmetic number, because the mean of its divisors is an integer number (5642955510661).

Almost surely, 2^{11285911021321} is an apocalyptic number.

It is an amenable number.

11285911021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11285911021321 is an equidigital number, since it uses as much as digits as its factorization.

11285911021321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 37.

Adding to 11285911021321 its reverse (12312011958211), we get a palindrome (23597922979532).

The spelling of 11285911021321 in words is "eleven trillion, two hundred eighty-five billion, nine hundred eleven million, twenty-one thousand, three hundred twenty-one".