13020211123 has 4 divisors (see below), whose sum is σ = 13166505720. Its totient is φ = 12873916528.

The previous prime is 13020211031. The next prime is 13020211129. The reversal of 13020211123 is 32111202031.

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 13020211123 - 2²¹ = 13018113971 is a prime.

It is a super-2 number, since 2×13020211123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13020211097 and 13020211106.

It is not an unprimeable number, because it can be changed into a prime (13020211129) 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, 73147165 + ... + 73147342.

It is an arithmetic number, because the mean of its divisors is an integer number (3291626430).

Almost surely, 2^13020211123 is an apocalyptic number.

13020211123 is a deficient number, since it is larger than the sum of its proper divisors (146294597).

13020211123 is an equidigital number, since it uses as much as digits as its factorization.

13020211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146294596.

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

Adding to 13020211123 its reverse (32111202031), we get a palindrome (45131413154).

The spelling of 13020211123 in words is "thirteen billion, twenty million, two hundred eleven thousand, one hundred twenty-three".