12211021021213 has 12 divisors (see below), whose sum is σ = 15040225172412. Its totient is φ = 9850907713920.

The previous prime is 12211021021187. The next prime is 12211021021229. The reversal of 12211021021213 is 31212012011221.

It can be written as a sum of positive squares in 2 ways, for example, as 9926866380249 + 2284154640964 = 3150693^2 + 1511342^2 .

It is not a de Polignac number, because 12211021021213 - 2⁴¹ = 10011997765661 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 (12211021021273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7329543598 + ... + 7329545263.

It is an arithmetic number, because the mean of its divisors is an integer number (1253352097701).

Almost surely, 2^{12211021021213} is an apocalyptic number.

It is an amenable number.

12211021021213 is a deficient number, since it is larger than the sum of its proper divisors (2829204151199).

12211021021213 is a wasteful number, since it uses less digits than its factorization.

12211021021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14659088892 (or 14659088885 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12211021021213 its reverse (31212012011221), we get a palindrome (43423033032434).

The spelling of 12211021021213 in words is "twelve trillion, two hundred eleven billion, twenty-one million, twenty-one thousand, two hundred thirteen".