12011023021212 has 144 divisors (see below), whose sum is σ = 31742459592480. Its totient is φ = 3824525376000.

The previous prime is 12011023021157. The next prime is 12011023021219. The reversal of 12011023021212 is 21212032011021.

12011023021212 is a `hidden beast` number, since 1 + 201 + 1 + 0 + 230 + 21 + 212 = 666.

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 (12011023021219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145576923 + ... + 145659405.

It is an arithmetic number, because the mean of its divisors is an integer number (220433747170).

Almost surely, 2^{12011023021212} is an apocalyptic number.

12011023021212 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 12011023021212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15871229796240).

12011023021212 is an abundant number, since it is smaller than the sum of its proper divisors (19731436571268).

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

12011023021212 is a wasteful number, since it uses less digits than its factorization.

12011023021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84004 (or 83999 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12011023021212 its reverse (21212032011021), we get a palindrome (33223055032233).

The spelling of 12011023021212 in words is "twelve trillion, eleven billion, twenty-three million, twenty-one thousand, two hundred twelve".