13111220123 has 16 divisors (see below), whose sum is σ = 13919162400. Its totient is φ = 12315525120.

The previous prime is 13111220033. The next prime is 13111220141. The reversal of 13111220123 is 32102211131.

It is a cyclic number.

It is not a de Polignac number, because 13111220123 - 2⁸ = 13111219867 is a prime.

It is a super-2 number, since 2×13111220123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13111220153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1060763 + ... + 1073051.

It is an arithmetic number, because the mean of its divisors is an integer number (869947650).

Almost surely, 2^13111220123 is an apocalyptic number.

13111220123 is a deficient number, since it is larger than the sum of its proper divisors (807942277).

13111220123 is a wasteful number, since it uses less digits than its factorization.

13111220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12782.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13111220123 its reverse (32102211131), we get a palindrome (45213431254).

The spelling of 13111220123 in words is "thirteen billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty-three".