12120321311311 has 4 divisors (see below), whose sum is σ = 12142479120472. Its totient is φ = 12098163502152.

The previous prime is 12120321311279. The next prime is 12120321311317. The reversal of 12120321311311 is 11311312302121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12120321311311 - 2⁵ = 12120321311279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120321311317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11078903760 + ... + 11078904853.

It is an arithmetic number, because the mean of its divisors is an integer number (3035619780118).

Almost surely, 2^{12120321311311} is an apocalyptic number.

12120321311311 is a deficient number, since it is larger than the sum of its proper divisors (22157809161).

12120321311311 is an equidigital number, since it uses as much as digits as its factorization.

12120321311311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22157809160.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 12120321311311 its reverse (11311312302121), we get a palindrome (23431633613432).

The spelling of 12120321311311 in words is "twelve trillion, one hundred twenty billion, three hundred twenty-one million, three hundred eleven thousand, three hundred eleven".