2112012989 has 2 divisors, whose sum is σ = 2112012990. Its totient is φ = 2112012988.

The previous prime is 2112012971. The next prime is 2112012997. The reversal of 2112012989 is 9892102112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1676247364 + 435765625 = 40942^2 + 20875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112012989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112012949) 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, 1056006494 + 1056006495.

It is an arithmetic number, because the mean of its divisors is an integer number (1056006495).

Almost surely, 2^2112012989 is an apocalyptic number.

It is an amenable number.

2112012989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112012989 is an equidigital number, since it uses as much as digits as its factorization.

2112012989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 2112012989 is about 45956.6424905040. The cubic root of 2112012989 is about 1283.0163622116.

The spelling of 2112012989 in words is "two billion, one hundred twelve million, twelve thousand, nine hundred eighty-nine".