13120321111 has 4 divisors (see below), whose sum is σ = 13121054352. Its totient is φ = 13119587872.

The previous prime is 13120321087. The next prime is 13120321127. The reversal of 13120321111 is 11112302131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112302131 = 7 ⋅1587471733.

It is a cyclic number.

It is not a de Polignac number, because 13120321111 - 2⁹ = 13120320599 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 (13120021111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339091 + ... + 375796.

It is an arithmetic number, because the mean of its divisors is an integer number (3280263588).

Almost surely, 2^13120321111 is an apocalyptic number.

13120321111 is a deficient number, since it is larger than the sum of its proper divisors (733241).

13120321111 is an equidigital number, since it uses as much as digits as its factorization.

13120321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733240.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 13120321111 its reverse (11112302131), we get a palindrome (24232623242).

The spelling of 13120321111 in words is "thirteen billion, one hundred twenty million, three hundred twenty-one thousand, one hundred eleven".