1221102222169 has 2 divisors, whose sum is σ = 1221102222170. Its totient is φ = 1221102222168.

The previous prime is 1221102222163. The next prime is 1221102222203. The reversal of 1221102222169 is 9612222011221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1059691124569 + 161411097600 = 1029413^2 + 401760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221102222169 - 2²⁷ = 1220968004441 is a prime.

It is a super-2 number, since 2×1221102222169² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221102222169.

It is not a weakly prime, because it can be changed into another prime (1221102222163) by changing a digit.

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 as a sum of consecutive naturals, namely, 610551111084 + 610551111085.

It is an arithmetic number, because the mean of its divisors is an integer number (610551111085).

Almost surely, 2^{1221102222169} is an apocalyptic number.

It is an amenable number.

1221102222169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221102222169 is an equidigital number, since it uses as much as digits as its factorization.

1221102222169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 1221102222169 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred twenty-two thousand, one hundred sixty-nine".