12011321220311 has 24 divisors (see below), whose sum is σ = 14725239336864. Its totient is φ = 9593659621440.

The previous prime is 12011321220263. The next prime is 12011321220323. The reversal of 12011321220311 is 11302212311021.

It is not a de Polignac number, because 12011321220311 - 2¹⁸ = 12011320958167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011321220611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38806460 + ... + 39114753.

It is an arithmetic number, because the mean of its divisors is an integer number (613551639036).

Almost surely, 2^{12011321220311} is an apocalyptic number.

12011321220311 is a deficient number, since it is larger than the sum of its proper divisors (2713918116553).

12011321220311 is an equidigital number, since it uses as much as digits as its factorization.

12011321220311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77921319 (or 77921300 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12011321220311 its reverse (11302212311021), we get a palindrome (23313533531332).

The spelling of 12011321220311 in words is "twelve trillion, eleven billion, three hundred twenty-one million, two hundred twenty thousand, three hundred eleven".