13121111023 has 4 divisors (see below), whose sum is σ = 13121371800. Its totient is φ = 13120850248.

The previous prime is 13121111011. The next prime is 13121111033. The reversal of 13121111023 is 32011112131.

It is a happy number.

13121111023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13121111023 - 2⁹ = 13121110511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121110988 and 13121111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121111033) 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 3 ways as a sum of consecutive naturals, for example, 28240 + ... + 164437.

It is an arithmetic number, because the mean of its divisors is an integer number (3280342950).

Almost surely, 2^13121111023 is an apocalyptic number.

13121111023 is a deficient number, since it is larger than the sum of its proper divisors (260777).

13121111023 is an equidigital number, since it uses as much as digits as its factorization.

13121111023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260776.

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

Adding to 13121111023 its reverse (32011112131), we get a palindrome (45132223154).

The spelling of 13121111023 in words is "thirteen billion, one hundred twenty-one million, one hundred eleven thousand, twenty-three".