111111210112212 has 72 divisors (see below), whose sum is σ = 295263469132800. Its totient is φ = 36133726806720.

The previous prime is 111111210112211. The next prime is 111111210112223. The reversal of 111111210112212 is 212211012111111.

111111210112212 is a `hidden beast` number, since 111 + 111 + 210 + 11 + 221 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111210112211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305829012 + ... + 306192107.

Almost surely, 2^{111111210112212} is an apocalyptic number.

111111210112212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111111210112212 is an abundant number, since it is smaller than the sum of its proper divisors (184152259020588).

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

111111210112212 is a wasteful number, since it uses less digits than its factorization.

111111210112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612021214 (or 612021165 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 111111210112212 its reverse (212211012111111), we get a palindrome (323322222223323).

The spelling of 111111210112212 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred ten million, one hundred twelve thousand, two hundred twelve".