12011212221232 has 160 divisors (see below), whose sum is σ = 27061567948800. Its totient is φ = 5058417475584.

The previous prime is 12011212221191. The next prime is 12011212221293. The reversal of 12011212221232 is 23212221211021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1080236569 + ... + 1080247687.

It is an arithmetic number, because the mean of its divisors is an integer number (169134799680).

Almost surely, 2^{12011212221232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011212221232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13530783974400).

12011212221232 is an abundant number, since it is smaller than the sum of its proper divisors (15050355727568).

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

12011212221232 is a wasteful number, since it uses less digits than its factorization.

12011212221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11883 (or 11877 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 12011212221232 its reverse (23212221211021), we get a palindrome (35223433432253).

The spelling of 12011212221232 in words is "twelve trillion, eleven billion, two hundred twelve million, two hundred twenty-one thousand, two hundred thirty-two".