5220111161 has 2 divisors, whose sum is σ = 5220111162. Its totient is φ = 5220111160.

The previous prime is 5220111151. The next prime is 5220111191. The reversal of 5220111161 is 1611110225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5177665936 + 42445225 = 71956^2 + 6515^2 .

It is a cyclic number.

It is not a de Polignac number, because 5220111161 - 2⁶ = 5220111097 is a prime.

It is not a weakly prime, because it can be changed into another prime (5220111151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610055580 + 2610055581.

It is an arithmetic number, because the mean of its divisors is an integer number (2610055581).

Almost surely, 2^5220111161 is an apocalyptic number.

It is an amenable number.

5220111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5220111161 is an equidigital number, since it uses as much as digits as its factorization.

5220111161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 5220111161 is about 72250.3367535405. The cubic root of 5220111161 is about 1734.7088085531.

Adding to 5220111161 its reverse (1611110225), we get a palindrome (6831221386).

The spelling of 5220111161 in words is "five billion, two hundred twenty million, one hundred eleven thousand, one hundred sixty-one".