222120161 has 2 divisors, whose sum is σ = 222120162. Its totient is φ = 222120160.

The previous prime is 222120149. The next prime is 222120169. The reversal of 222120161 is 161021222.

222120161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117180625 + 104939536 = 10825^2 + 10244^2 .

It is a cyclic number.

It is not a de Polignac number, because 222120161 - 2⁶ = 222120097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222120169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060080 + 111060081.

It is an arithmetic number, because the mean of its divisors is an integer number (111060081).

Almost surely, 2^222120161 is an apocalyptic number.

It is an amenable number.

222120161 is a deficient number, since it is larger than the sum of its proper divisors (1).

222120161 is an equidigital number, since it uses as much as digits as its factorization.

222120161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 222120161 is about 14903.6962193947. The cubic root of 222120161 is about 605.6141213034.

Adding to 222120161 its reverse (161021222), we get a palindrome (383141383).

The spelling of 222120161 in words is "two hundred twenty-two million, one hundred twenty thousand, one hundred sixty-one".