12021131133212 has 24 divisors (see below), whose sum is σ = 21715845836160. Its totient is φ = 5816608289280.

The previous prime is 12021131133203. The next prime is 12021131133217. The reversal of 12021131133212 is 21233113112021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021131133217) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11023364 + ... + 12064692.

It is an arithmetic number, because the mean of its divisors is an integer number (904826909840).

Almost surely, 2^{12021131133212} is an apocalyptic number.

It is an amenable number.

12021131133212 is a deficient number, since it is larger than the sum of its proper divisors (9694714702948).

12021131133212 is a wasteful number, since it uses less digits than its factorization.

12021131133212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134461 (or 1134459 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 12021131133212 its reverse (21233113112021), we get a palindrome (33254244245233).

The spelling of 12021131133212 in words is "twelve trillion, twenty-one billion, one hundred thirty-one million, one hundred thirty-three thousand, two hundred twelve".