866110237121 has 2 divisors, whose sum is σ = 866110237122. Its totient is φ = 866110237120.

The previous prime is 866110236997. The next prime is 866110237127. The reversal of 866110237121 is 121732011668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 522966170896 + 343144066225 = 723164^2 + 585785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866110237121 is a prime.

It is not a weakly prime, because it can be changed into another prime (866110237127) 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, 433055118560 + 433055118561.

It is an arithmetic number, because the mean of its divisors is an integer number (433055118561).

Almost surely, 2^866110237121 is an apocalyptic number.

It is an amenable number.

866110237121 is a deficient number, since it is larger than the sum of its proper divisors (1).

866110237121 is an equidigital number, since it uses as much as digits as its factorization.

866110237121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

Adding to 866110237121 its reverse (121732011668), we get a palindrome (987842248789).

The spelling of 866110237121 in words is "eight hundred sixty-six billion, one hundred ten million, two hundred thirty-seven thousand, one hundred twenty-one".