2220212161 has 2 divisors, whose sum is σ = 2220212162. Its totient is φ = 2220212160.

The previous prime is 2220212153. The next prime is 2220212207. The reversal of 2220212161 is 1612120222.

2220212161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1592409025 + 627803136 = 39905^2 + 25056^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220212161 - 2³ = 2220212153 is a prime.

It is not a weakly prime, because it can be changed into another prime (2220612161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110106080 + 1110106081.

It is an arithmetic number, because the mean of its divisors is an integer number (1110106081).

Almost surely, 2^2220212161 is an apocalyptic number.

It is an amenable number.

2220212161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220212161 is an equidigital number, since it uses as much as digits as its factorization.

2220212161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2220212161 is about 47119.1273369955. The cubic root of 2220212161 is about 1304.5623055175.

Adding to 2220212161 its reverse (1612120222), we get a palindrome (3832332383).

The spelling of 2220212161 in words is "two billion, two hundred twenty million, two hundred twelve thousand, one hundred sixty-one".