2112457812 has 12 divisors (see below), whose sum is σ = 4929068256. Its totient is φ = 704152600.

The previous prime is 2112457799. The next prime is 2112457813. The reversal of 2112457812 is 2187542112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×2112457812³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112457813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88019064 + ... + 88019087.

It is an arithmetic number, because the mean of its divisors is an integer number (410755688).

Almost surely, 2^2112457812 is an apocalyptic number.

It is an amenable number.

2112457812 is an abundant number, since it is smaller than the sum of its proper divisors (2816610444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2112457812 is a wasteful number, since it uses less digits than its factorization.

2112457812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176038158 (or 176038156 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 2112457812 is about 45961.4818298975. The cubic root of 2112457812 is about 1283.1064303327.

Adding to 2112457812 its reverse (2187542112), we get a palindrome (4299999924).

The spelling of 2112457812 in words is "two billion, one hundred twelve million, four hundred fifty-seven thousand, eight hundred twelve".