13120012123 has 16 divisors (see below), whose sum is σ = 14221633536. Its totient is φ = 12055317120.

The previous prime is 13120012121. The next prime is 13120012127. The reversal of 13120012123 is 32121002131.

It is a cyclic number.

It is not a de Polignac number, because 13120012123 - 2¹ = 13120012121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13120012097 and 13120012106.

It is not an unprimeable number, because it can be changed into a prime (13120012121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2651790 + ... + 2656732.

It is an arithmetic number, because the mean of its divisors is an integer number (888852096).

Almost surely, 2^13120012123 is an apocalyptic number.

13120012123 is a deficient number, since it is larger than the sum of its proper divisors (1101621413).

13120012123 is a wasteful number, since it uses less digits than its factorization.

13120012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8634.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13120012123 its reverse (32121002131), we get a palindrome (45241014254).

The spelling of 13120012123 in words is "thirteen billion, one hundred twenty million, twelve thousand, one hundred twenty-three".