1222166560165 has 8 divisors (see below), whose sum is σ = 1466620726680. Its totient is φ = 977719345152.

The previous prime is 1222166560103. The next prime is 1222166560211. The reversal of 1222166560165 is 5610656612221.

It can be written as a sum of positive squares in 4 ways, for example, as 53860662241 + 1168305897924 = 232079^2 + 1080882^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222166560165 is a prime.

It is a super-2 number, since 2×1222166560165² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342924 + ... + 2061013.

It is an arithmetic number, because the mean of its divisors is an integer number (183327590835).

Almost surely, 2^{1222166560165} is an apocalyptic number.

It is an amenable number.

1222166560165 is a deficient number, since it is larger than the sum of its proper divisors (244454166515).

1222166560165 is an equidigital number, since it uses as much as digits as its factorization.

1222166560165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3475751.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 1222166560165 in words is "one trillion, two hundred twenty-two billion, one hundred sixty-six million, five hundred sixty thousand, one hundred sixty-five".