2112681729 has 8 divisors (see below), whose sum is σ = 2823797920. Its totient is φ = 1405010016.

The previous prime is 2112681691. The next prime is 2112681731. The reversal of 2112681729 is 9271862112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2112681729 - 2¹⁶ = 2112616193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112681799) 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 in 7 ways as a sum of consecutive naturals, for example, 859687 + ... + 862140.

It is an arithmetic number, because the mean of its divisors is an integer number (352974740).

Almost surely, 2^2112681729 is an apocalyptic number.

It is an amenable number.

2112681729 is a deficient number, since it is larger than the sum of its proper divisors (711116191).

2112681729 is a wasteful number, since it uses less digits than its factorization.

2112681729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722239.

The product of its digits is 24192, while the sum is 39.

The square root of 2112681729 is about 45963.9176855063. The cubic root of 2112681729 is about 1283.1517644438.

The spelling of 2112681729 in words is "two billion, one hundred twelve million, six hundred eighty-one thousand, seven hundred twenty-nine".