12311213011021 has 16 divisors (see below), whose sum is σ = 12362829583104. Its totient is φ = 12259682083584.

The previous prime is 12311213011007. The next prime is 12311213011057. The reversal of 12311213011021 is 12011031211321.

It is a cyclic number.

It is not a de Polignac number, because 12311213011021 - 2¹⁷ = 12311212879949 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 12311213011021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311213071021) 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 15 ways as a sum of consecutive naturals, for example, 1712979990 + ... + 1712987176.

It is an arithmetic number, because the mean of its divisors is an integer number (772676848944).

Almost surely, 2^{12311213011021} is an apocalyptic number.

It is an amenable number.

12311213011021 is a deficient number, since it is larger than the sum of its proper divisors (51616572083).

12311213011021 is a wasteful number, since it uses less digits than its factorization.

12311213011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12180.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 12311213011021 its reverse (12011031211321), we get a palindrome (24322244222342).

The spelling of 12311213011021 in words is "twelve trillion, three hundred eleven billion, two hundred thirteen million, eleven thousand, twenty-one".