11206655057821 has 2 divisors, whose sum is σ = 11206655057822. Its totient is φ = 11206655057820.

The previous prime is 11206655057651. The next prime is 11206655057827. The reversal of 11206655057821 is 12875055660211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9321358548100 + 1885296509721 = 3053090^2 + 1373061^2 .

It is a cyclic number.

It is not a de Polignac number, because 11206655057821 - 2³⁹ = 10656899243933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11206655057827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5603327528910 + 5603327528911.

It is an arithmetic number, because the mean of its divisors is an integer number (5603327528911).

Almost surely, 2^{11206655057821} is an apocalyptic number.

It is an amenable number.

11206655057821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11206655057821 is an equidigital number, since it uses as much as digits as its factorization.

11206655057821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008000, while the sum is 49.

The spelling of 11206655057821 in words is "eleven trillion, two hundred six billion, six hundred fifty-five million, fifty-seven thousand, eight hundred twenty-one".