12011211112212 has 36 divisors (see below), whose sum is σ = 32697185806740. Its totient is φ = 3695757265152.

The previous prime is 12011211112171. The next prime is 12011211112213. The reversal of 12011211112212 is 21221111211021.

It is a happy number.

12011211112212 is a `hidden beast` number, since 120 + 11 + 211 + 112 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1879492934916 + 10131718177296 = 1370946^2 + 3183036^2 .

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 not an unprimeable number, because it can be changed into a prime (12011211112213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12832490037 + ... + 12832490972.

Almost surely, 2^{12011211112212} is an apocalyptic number.

12011211112212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12011211112212 is an abundant number, since it is smaller than the sum of its proper divisors (20685974694528).

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

12011211112212 is a wasteful number, since it uses less digits than its factorization.

12011211112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25664981032 (or 25664981027 counting only the distinct ones).

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

Adding to 12011211112212 its reverse (21221111211021), we get a palindrome (33232322323233).

The spelling of 12011211112212 in words is "twelve trillion, eleven billion, two hundred eleven million, one hundred twelve thousand, two hundred twelve".