13121323011211 has 4 divisors (see below), whose sum is σ = 13368895143552. Its totient is φ = 12873750878872.

The previous prime is 13121323011187. The next prime is 13121323011217. The reversal of 13121323011211 is 11211032312131.

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

It is a cyclic number.

It is not a de Polignac number, because 13121323011211 - 2¹⁵ = 13121322978443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121323011217) 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, 123786066091 + ... + 123786066196.

It is an arithmetic number, because the mean of its divisors is an integer number (3342223785888).

Almost surely, 2^{13121323011211} is an apocalyptic number.

13121323011211 is a deficient number, since it is larger than the sum of its proper divisors (247572132341).

13121323011211 is an equidigital number, since it uses as much as digits as its factorization.

13121323011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247572132340.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 13121323011211 its reverse (11211032312131), we get a palindrome (24332355323342).

The spelling of 13121323011211 in words is "thirteen trillion, one hundred twenty-one billion, three hundred twenty-three million, eleven thousand, two hundred eleven".