13221303123 has 32 divisors (see below), whose sum is σ = 20341325824. Its totient is φ = 7482277152.

The previous prime is 13221303113. The next prime is 13221303143. The reversal of 13221303123 is 32130312231.

It is not a de Polignac number, because 13221303123 - 2¹⁴ = 13221286739 is a prime.

It is a super-3 number, since 3×13221303123³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 13221303123.

It is not an unprimeable number, because it can be changed into a prime (13221303113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1614786 + ... + 1622952.

It is an arithmetic number, because the mean of its divisors is an integer number (635666432).

Almost surely, 2^13221303123 is an apocalyptic number.

13221303123 is a deficient number, since it is larger than the sum of its proper divisors (7120022701).

13221303123 is a wasteful number, since it uses less digits than its factorization.

13221303123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8911.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 13221303123 its reverse (32130312231), we get a palindrome (45351615354).

The spelling of 13221303123 in words is "thirteen billion, two hundred twenty-one million, three hundred three thousand, one hundred twenty-three".