12021311021232 has 80 divisors (see below), whose sum is σ = 31378221859712. Its totient is φ = 3965412464640.

The previous prime is 12021311021177. The next prime is 12021311021233. The reversal of 12021311021232 is 23212011312021.

It is a junction number, because it is equal to n+sod(n) for n = 12021311021199 and 12021311021208.

It is not an unprimeable number, because it can be changed into a prime (12021311021233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50589963 + ... + 50827029.

Almost surely, 2^{12021311021232} is an apocalyptic number.

12021311021232 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 12021311021232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15689110929856).

12021311021232 is an abundant number, since it is smaller than the sum of its proper divisors (19356910838480).

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

12021311021232 is a wasteful number, since it uses less digits than its factorization.

12021311021232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248066 (or 248060 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 12021311021232 its reverse (23212011312021), we get a palindrome (35233322333253).

The spelling of 12021311021232 in words is "twelve trillion, twenty-one billion, three hundred eleven million, twenty-one thousand, two hundred thirty-two".