111212112022169 has 2 divisors, whose sum is σ = 111212112022170. Its totient is φ = 111212112022168.

The previous prime is 111212112022031. The next prime is 111212112022189. The reversal of 111212112022169 is 961220211212111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111211788490000 + 323532169 = 10545700^2 + 17987^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212112022169 - 2³⁶ = 111143392545433 is a prime.

It is a super-2 number, since 2×111212112022169² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111212112022189) 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, 55606056011084 + 55606056011085.

It is an arithmetic number, because the mean of its divisors is an integer number (55606056011085).

Almost surely, 2^{111212112022169} is an apocalyptic number.

It is an amenable number.

111212112022169 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212112022169 is an equidigital number, since it uses as much as digits as its factorization.

111212112022169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 32.

The spelling of 111212112022169 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twelve million, twenty-two thousand, one hundred sixty-nine".