2112122210161 has 2 divisors, whose sum is σ = 2112122210162. Its totient is φ = 2112122210160.

The previous prime is 2112122210129. The next prime is 2112122210227. The reversal of 2112122210161 is 1610122212112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1802937280225 + 309184929936 = 1342735^2 + 556044^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112122210161 - 2⁵ = 2112122210129 is a prime.

It is a super-2 number, since 2×2112122210161² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2112122216161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056061105080 + 1056061105081.

It is an arithmetic number, because the mean of its divisors is an integer number (1056061105081).

Almost surely, 2^{2112122210161} is an apocalyptic number.

It is an amenable number.

2112122210161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112122210161 is an equidigital number, since it uses as much as digits as its factorization.

2112122210161 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 22.

Adding to 2112122210161 its reverse (1610122212112), we get a palindrome (3722244422273).

The spelling of 2112122210161 in words is "two trillion, one hundred twelve billion, one hundred twenty-two million, two hundred ten thousand, one hundred sixty-one".