13120021311 has 8 divisors (see below), whose sum is σ = 17528991744. Its totient is φ = 8728865880.

The previous prime is 13120021289. The next prime is 13120021319. The reversal of 13120021311 is 11312002131.

It is a happy number.

13120021311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13120021311 - 2⁹ = 13120020799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120021319) 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 7 ways as a sum of consecutive naturals, for example, 4452031 + ... + 4454976.

It is an arithmetic number, because the mean of its divisors is an integer number (2191123968).

Almost surely, 2^13120021311 is an apocalyptic number.

13120021311 is a deficient number, since it is larger than the sum of its proper divisors (4408970433).

13120021311 is an equidigital number, since it uses as much as digits as its factorization.

13120021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8907501.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13120021311 its reverse (11312002131), we get a palindrome (24432023442).

The spelling of 13120021311 in words is "thirteen billion, one hundred twenty million, twenty-one thousand, three hundred eleven".