10206243221165 has 4 divisors (see below), whose sum is σ = 12247491865404. Its totient is φ = 8164994576928.

The previous prime is 10206243221147. The next prime is 10206243221177. The reversal of 10206243221165 is 56112234260201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4101929203684 + 6104314017481 = 2025322^2 + 2470691^2 .

It is a cyclic number.

It is not a de Polignac number, because 10206243221165 - 2³⁰ = 10205169479341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020624322112 + ... + 1020624322121.

It is an arithmetic number, because the mean of its divisors is an integer number (3061872966351).

Almost surely, 2^{10206243221165} is an apocalyptic number.

It is an amenable number.

10206243221165 is a deficient number, since it is larger than the sum of its proper divisors (2041248644239).

10206243221165 is an equidigital number, since it uses as much as digits as its factorization.

10206243221165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041248644238.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 10206243221165 its reverse (56112234260201), we get a palindrome (66318477481366).

The spelling of 10206243221165 in words is "ten trillion, two hundred six billion, two hundred forty-three million, two hundred twenty-one thousand, one hundred sixty-five".