111211102111212 has 18 divisors (see below), whose sum is σ = 281116952558988. Its totient is φ = 37070367370392.

The previous prime is 111211102111169. The next prime is 111211102111231. The reversal of 111211102111212 is 212111201112111.

111211102111212 is a `hidden beast` number, since 11 + 121 + 110 + 211 + 1 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×111211102111212² (a number of 29 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1544598640398 + ... + 1544598640469.

Almost surely, 2^{111211102111212} is an apocalyptic number.

111211102111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111211102111212 is an abundant number, since it is smaller than the sum of its proper divisors (169905850447776).

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

111211102111212 is a wasteful number, since it uses less digits than its factorization.

111211102111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089197280877 (or 3089197280872 counting only the distinct ones).

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

Adding to 111211102111212 its reverse (212111201112111), we get a palindrome (323322303223323).

The spelling of 111211102111212 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred two million, one hundred eleven thousand, two hundred twelve".