12011321220013 has 4 divisors (see below), whose sum is σ = 12011341480348. Its totient is φ = 12011300959680.

The previous prime is 12011321220001. The next prime is 12011321220023. The reversal of 12011321220013 is 31002212311021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8504473235049 + 3506847984964 = 2916243^2 + 1872658^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011321220013 - 2²⁹ = 12010784349101 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 (12011321220023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9213228 + ... + 10435813.

It is an arithmetic number, because the mean of its divisors is an integer number (3002835370087).

Almost surely, 2^{12011321220013} is an apocalyptic number.

It is an amenable number.

12011321220013 is a deficient number, since it is larger than the sum of its proper divisors (20260335).

12011321220013 is an equidigital number, since it uses as much as digits as its factorization.

12011321220013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20260334.

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

Adding to 12011321220013 its reverse (31002212311021), we get a palindrome (43013533531034).

The spelling of 12011321220013 in words is "twelve trillion, eleven billion, three hundred twenty-one million, two hundred twenty thousand, thirteen".