12011320321021 has 8 divisors (see below), whose sum is σ = 13855515030720. Its totient is φ = 10199198563008.

The previous prime is 12011320320997. The next prime is 12011320321037. The reversal of 12011320321021 is 12012302311021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12011320321021 - 2³³ = 12002730386429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12011320321021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011320321051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8018237116 + ... + 8018238613.

It is an arithmetic number, because the mean of its divisors is an integer number (1731939378840).

Almost surely, 2^{12011320321021} is an apocalyptic number.

It is an amenable number.

12011320321021 is a deficient number, since it is larger than the sum of its proper divisors (1844194709699).

12011320321021 is a wasteful number, since it uses less digits than its factorization.

12011320321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16036475843.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12011320321021 its reverse (12012302311021), we get a palindrome (24023622632042).

The spelling of 12011320321021 in words is "twelve trillion, eleven billion, three hundred twenty million, three hundred twenty-one thousand, twenty-one".