2112512111 has 4 divisors (see below), whose sum is σ = 2125472472. Its totient is φ = 2099551752.

The previous prime is 2112512029. The next prime is 2112512113. The reversal of 2112512111 is 1112152112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2112512111 - 2¹⁴ = 2112495727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112512111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112512113) 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 3 ways as a sum of consecutive naturals, for example, 6479936 + ... + 6480261.

It is an arithmetic number, because the mean of its divisors is an integer number (531368118).

Almost surely, 2^2112512111 is an apocalyptic number.

2112512111 is a deficient number, since it is larger than the sum of its proper divisors (12960361).

2112512111 is a wasteful number, since it uses less digits than its factorization.

2112512111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12960360.

The product of its digits is 40, while the sum is 17.

The square root of 2112512111 is about 45962.0725272479. The cubic root of 2112512111 is about 1283.1174239722.

Adding to 2112512111 its reverse (1112152112), we get a palindrome (3224664223).

The spelling of 2112512111 in words is "two billion, one hundred twelve million, five hundred twelve thousand, one hundred eleven".