11115289281601 has 2 divisors, whose sum is σ = 11115289281602. Its totient is φ = 11115289281600.

The previous prime is 11115289281589. The next prime is 11115289281659. The reversal of 11115289281601 is 10618298251111.

11115289281601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 3333960²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11115289281600 + 1 = 3333960^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11115289281601 is a prime.

It is not a weakly prime, because it can be changed into another prime (11115289281101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557644640800 + 5557644640801.

It is an arithmetic number, because the mean of its divisors is an integer number (5557644640801).

Almost surely, 2^{11115289281601} is an apocalyptic number.

It is an amenable number.

11115289281601 is a deficient number, since it is larger than the sum of its proper divisors (1).

11115289281601 is an equidigital number, since it uses as much as digits as its factorization.

11115289281601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 46.

The spelling of 11115289281601 in words is "eleven trillion, one hundred fifteen billion, two hundred eighty-nine million, two hundred eighty-one thousand, six hundred one".