561222121222165 has 32 divisors (see below), whose sum is σ = 768991010860800. Its totient is φ = 389525534475264.

The previous prime is 561222121222163. The next prime is 561222121222219.

561222121222165 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 561222121222165 - 2¹ = 561222121222163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561222121222163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 348504315 + ... + 350110984.

It is an arithmetic number, because the mean of its divisors is an integer number (24030969089400).

Almost surely, 2^{561222121222165} is an apocalyptic number.

It is an amenable number.

561222121222165 is a deficient number, since it is larger than the sum of its proper divisors (207768889638635).

561222121222165 is a wasteful number, since it uses less digits than its factorization.

561222121222165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698616061.

The product of its digits is 115200, while the sum is 40.

The spelling of 561222121222165 in words is "five hundred sixty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred sixty-five".