11227206541861 has 2 divisors, whose sum is σ = 11227206541862. Its totient is φ = 11227206541860.

The previous prime is 11227206541823. The next prime is 11227206541867. The reversal of 11227206541861 is 16814560272211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8441959305025 + 2785247236836 = 2905505^2 + 1668906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11227206541861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11227206541867) 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, 5613603270930 + 5613603270931.

It is an arithmetic number, because the mean of its divisors is an integer number (5613603270931).

Almost surely, 2^{11227206541861} is an apocalyptic number.

It is an amenable number.

11227206541861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11227206541861 is an equidigital number, since it uses as much as digits as its factorization.

11227206541861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 11227206541861 in words is "eleven trillion, two hundred twenty-seven billion, two hundred six million, five hundred forty-one thousand, eight hundred sixty-one".