11563554582121 has 2 divisors, whose sum is σ = 11563554582122. Its totient is φ = 11563554582120.

The previous prime is 11563554582091. The next prime is 11563554582131. The reversal of 11563554582121 is 12128545536511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7139241988096 + 4424312594025 = 2671936^2 + 2103405^2 .

It is a cyclic number.

It is not a de Polignac number, because 11563554582121 - 2¹⁵ = 11563554549353 is a prime.

It is not a weakly prime, because it can be changed into another prime (11563554582131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5781777291060 + 5781777291061.

It is an arithmetic number, because the mean of its divisors is an integer number (5781777291061).

Almost surely, 2^{11563554582121} is an apocalyptic number.

It is an amenable number.

11563554582121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11563554582121 is an equidigital number, since it uses as much as digits as its factorization.

11563554582121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440000, while the sum is 49.

The spelling of 11563554582121 in words is "eleven trillion, five hundred sixty-three billion, five hundred fifty-four million, five hundred eighty-two thousand, one hundred twenty-one".