111100211221212 has 36 divisors (see below), whose sum is σ = 280862651815200. Its totient is φ = 37029974274432.

The previous prime is 111100211221189. The next prime is 111100211221231. The reversal of 111100211221212 is 212122112001111.

It is a happy number.

111100211221212 is a `hidden beast` number, since 1 + 11 + 10 + 0 + 211 + 221 + 212 = 666.

111100211221212 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142500253 + ... + 143277780.

It is an arithmetic number, because the mean of its divisors is an integer number (7801740328200).

Almost surely, 2^{111100211221212} is an apocalyptic number.

111100211221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111100211221212 is an abundant number, since it is smaller than the sum of its proper divisors (169762440593988).

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

111100211221212 is a wasteful number, since it uses less digits than its factorization.

111100211221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285788842 (or 285788837 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111100211221212 its reverse (212122112001111), we get a palindrome (323222323222323).

The spelling of 111100211221212 in words is "one hundred eleven trillion, one hundred billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twelve".