12011221210212 has 144 divisors (see below), whose sum is σ = 35643179749632. Its totient is φ = 3338438042880.

The previous prime is 12011221210181. The next prime is 12011221210229. The reversal of 12011221210212 is 21201212211021.

12011221210212 is a `hidden beast` number, since 1 + 20 + 1 + 1 + 221 + 210 + 212 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54164353 + ... + 54385655.

Almost surely, 2^{12011221210212} is an apocalyptic number.

12011221210212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011221210212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17821589874816).

12011221210212 is an abundant number, since it is smaller than the sum of its proper divisors (23631958539420).

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

12011221210212 is a wasteful number, since it uses less digits than its factorization.

12011221210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227178 (or 227173 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12011221210212 its reverse (21201212211021), we get a palindrome (33212433421233).

The spelling of 12011221210212 in words is "twelve trillion, eleven billion, two hundred twenty-one million, two hundred ten thousand, two hundred twelve".