13220203123 has 4 divisors (see below), whose sum is σ = 13220443800. Its totient is φ = 13219962448.

The previous prime is 13220203109. The next prime is 13220203147. The reversal of 13220203123 is 32130202231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32130202231 = 95569 ⋅336199.

It is a cyclic number.

It is not a de Polignac number, because 13220203123 - 2⁵ = 13220203091 is a prime.

It is a super-2 number, since 2×13220203123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13220203123.

It is not an unprimeable number, because it can be changed into a prime (13220203823) 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 3 ways as a sum of consecutive naturals, for example, 6903 + ... + 162751.

It is an arithmetic number, because the mean of its divisors is an integer number (3305110950).

Almost surely, 2^13220203123 is an apocalyptic number.

13220203123 is a deficient number, since it is larger than the sum of its proper divisors (240677).

13220203123 is an equidigital number, since it uses as much as digits as its factorization.

13220203123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240676.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 13220203123 its reverse (32130202231), we get a palindrome (45350405354).

The spelling of 13220203123 in words is "thirteen billion, two hundred twenty million, two hundred three thousand, one hundred twenty-three".