2011172112 has 80 divisors (see below), whose sum is σ = 5895694080. Its totient is φ = 656120448.

The previous prime is 2011172099. The next prime is 2011172113. The reversal of 2011172112 is 2112711102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2011172113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29223 + ... + 69830.

It is an arithmetic number, because the mean of its divisors is an integer number (73696176).

Almost surely, 2^2011172112 is an apocalyptic number.

It is an amenable number.

2011172112 is an abundant number, since it is smaller than the sum of its proper divisors (3884521968).

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

2011172112 is a wasteful number, since it uses less digits than its factorization.

2011172112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99117 (or 99105 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

The square root of 2011172112 is about 44846.0936091428. The cubic root of 2011172112 is about 1262.2626916251.

Adding to 2011172112 its reverse (2112711102), we get a palindrome (4123883214).

The spelling of 2011172112 in words is "two billion, eleven million, one hundred seventy-two thousand, one hundred twelve".