2112122281 has 2 divisors, whose sum is σ = 2112122282. Its totient is φ = 2112122280.

The previous prime is 2112122267. The next prime is 2112122303. The reversal of 2112122281 is 1822212112.

It is an a-pointer prime, because the next prime (2112122303) can be obtained adding 2112122281 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1132995600 + 979126681 = 33660^2 + 31291^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112122281 - 2⁵ = 2112122249 is a prime.

It is a super-2 number, since 2×2112122281² = 8922121059793285922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2112122231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056061140 + 1056061141.

It is an arithmetic number, because the mean of its divisors is an integer number (1056061141).

Almost surely, 2^2112122281 is an apocalyptic number.

It is an amenable number.

2112122281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112122281 is an equidigital number, since it uses as much as digits as its factorization.

2112122281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256, while the sum is 22.

The square root of 2112122281 is about 45957.8315524133. The cubic root of 2112122281 is about 1283.0384929160.

Adding to 2112122281 its reverse (1822212112), we get a palindrome (3934334393).

The spelling of 2112122281 in words is "two billion, one hundred twelve million, one hundred twenty-two thousand, two hundred eighty-one".