220101201161 has 2 divisors, whose sum is σ = 220101201162. Its totient is φ = 220101201160.

The previous prime is 220101201149. The next prime is 220101201217. The reversal of 220101201161 is 161102101022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161558979136 + 58542222025 = 401944^2 + 241955^2 .

It is a cyclic number.

It is not a de Polignac number, because 220101201161 - 2¹⁸ = 220100939017 is a prime.

It is not a weakly prime, because it can be changed into another prime (220101201101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110050600580 + 110050600581.

It is an arithmetic number, because the mean of its divisors is an integer number (110050600581).

Almost surely, 2^220101201161 is an apocalyptic number.

It is an amenable number.

220101201161 is a deficient number, since it is larger than the sum of its proper divisors (1).

220101201161 is an equidigital number, since it uses as much as digits as its factorization.

220101201161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 220101201161 its reverse (161102101022), we get a palindrome (381203302183).

The spelling of 220101201161 in words is "two hundred twenty billion, one hundred one million, two hundred one thousand, one hundred sixty-one".