2112122081 has 2 divisors, whose sum is σ = 2112122082. Its totient is φ = 2112122080.

The previous prime is 2112122053. The next prime is 2112122119. The reversal of 2112122081 is 1802212112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1082739025 + 1029383056 = 32905^2 + 32084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112122081 is a prime.

It is a super-2 number, since 2×2112122081² = 8922119370095541122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2112122281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056061040 + 1056061041.

It is an arithmetic number, because the mean of its divisors is an integer number (1056061041).

Almost surely, 2^2112122081 is an apocalyptic number.

It is an amenable number.

2112122081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112122081 is an equidigital number, since it uses as much as digits as its factorization.

2112122081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 2112122081 is about 45957.8293765056. The cubic root of 2112122081 is about 1283.0384524184.

Adding to 2112122081 its reverse (1802212112), we get a palindrome (3914334193).

The spelling of 2112122081 in words is "two billion, one hundred twelve million, one hundred twenty-two thousand, eighty-one".