12111112201212 has 48 divisors (see below), whose sum is σ = 31704026215680. Its totient is φ = 3997842858864.

The previous prime is 12111112201159. The next prime is 12111112201229. The reversal of 12111112201212 is 21210221111121.

It is a happy number.

12111112201212 is a `hidden beast` number, since 1 + 211 + 111 + 220 + 121 + 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 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 15 ways as a sum of consecutive naturals, for example, 544357458 + ... + 544379705.

It is an arithmetic number, because the mean of its divisors is an integer number (660500546160).

Almost surely, 2^{12111112201212} is an apocalyptic number.

12111112201212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111112201212 is an abundant number, since it is smaller than the sum of its proper divisors (19592914014468).

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

12111112201212 is a wasteful number, since it uses less digits than its factorization.

12111112201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088737279 (or 1088737271 counting only the distinct ones).

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

Adding to 12111112201212 its reverse (21210221111121), we get a palindrome (33321333312333).

The spelling of 12111112201212 in words is "twelve trillion, one hundred eleven billion, one hundred twelve million, two hundred one thousand, two hundred twelve".