1011220221169 has 2 divisors, whose sum is σ = 1011220221170. Its totient is φ = 1011220221168.

The previous prime is 1011220221163. The next prime is 1011220221227. The reversal of 1011220221169 is 9611220221101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1010266214400 + 954006769 = 1005120^2 + 30887^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011220221169 - 2³¹ = 1009072737521 is a prime.

It is a super-2 number, since 2×1011220221169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1011220221163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505610110584 + 505610110585.

It is an arithmetic number, because the mean of its divisors is an integer number (505610110585).

Almost surely, 2^{1011220221169} is an apocalyptic number.

It is an amenable number.

1011220221169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011220221169 is an equidigital number, since it uses as much as digits as its factorization.

1011220221169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 1011220221169 in words is "one trillion, eleven billion, two hundred twenty million, two hundred twenty-one thousand, one hundred sixty-nine".