212111011112 has 64 divisors (see below), whose sum is σ = 533985782400. Its totient is φ = 76283677440.

The previous prime is 212111011103. The next prime is 212111011127. The reversal of 212111011112 is 211110111212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13235687 + ... + 13251702.

It is an arithmetic number, because the mean of its divisors is an integer number (8343527850).

Almost surely, 2^212111011112 is an apocalyptic number.

212111011112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212111011112 is an abundant number, since it is smaller than the sum of its proper divisors (321874771288).

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

212111011112 is a wasteful number, since it uses less digits than its factorization.

212111011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26487426 (or 26487422 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 212111011112 its reverse (211110111212), we get a palindrome (423221122324).

The spelling of 212111011112 in words is "two hundred twelve billion, one hundred eleven million, eleven thousand, one hundred twelve".