4222220161 has 2 divisors, whose sum is σ = 4222220162. Its totient is φ = 4222220160.

The previous prime is 4222220131. The next prime is 4222220201. The reversal of 4222220161 is 1610222224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3809358400 + 412861761 = 61720^2 + 20319^2 .

It is a cyclic number.

It is not a de Polignac number, because 4222220161 - 2²¹ = 4220123009 is a prime.

It is not a weakly prime, because it can be changed into another prime (4222220131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2111110080 + 2111110081.

It is an arithmetic number, because the mean of its divisors is an integer number (2111110081).

Almost surely, 2^4222220161 is an apocalyptic number.

It is an amenable number.

4222220161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4222220161 is an equidigital number, since it uses as much as digits as its factorization.

4222220161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 4222220161 is about 64978.6131046208. The cubic root of 4222220161 is about 1616.2689322675.

Adding to 4222220161 its reverse (1610222224), we get a palindrome (5832442385).

The spelling of 4222220161 in words is "four billion, two hundred twenty-two million, two hundred twenty thousand, one hundred sixty-one".