12331211221013 has 4 divisors (see below), whose sum is σ = 12631972470348. Its totient is φ = 12030449971680.

The previous prime is 12331211220989. The next prime is 12331211221027. The reversal of 12331211221013 is 31012211213321.

It is a happy number.

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 1220708990449 + 11110502230564 = 1104857^2 + 3333242^2 .

It is a cyclic number.

It is not a de Polignac number, because 12331211221013 - 2¹⁴ = 12331211204629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12331211221013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331211221913) 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, 150380624606 + ... + 150380624687.

It is an arithmetic number, because the mean of its divisors is an integer number (3157993117587).

Almost surely, 2^{12331211221013} is an apocalyptic number.

It is an amenable number.

12331211221013 is a deficient number, since it is larger than the sum of its proper divisors (300761249335).

12331211221013 is an equidigital number, since it uses as much as digits as its factorization.

12331211221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300761249334.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 12331211221013 its reverse (31012211213321), we get a palindrome (43343422434334).

The spelling of 12331211221013 in words is "twelve trillion, three hundred thirty-one billion, two hundred eleven million, two hundred twenty-one thousand, thirteen".