13221232123 has 8 divisors (see below), whose sum is σ = 14452543296. Its totient is φ = 11994817800.

The previous prime is 13221232103. The next prime is 13221232139. The reversal of 13221232123 is 32123212231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13221232123 - 2⁵ = 13221232091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221232094 and 13221232103.

It is not an unprimeable number, because it can be changed into a prime (13221232103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218561 + ... + 1229362.

It is an arithmetic number, because the mean of its divisors is an integer number (1806567912).

Almost surely, 2^13221232123 is an apocalyptic number.

13221232123 is a deficient number, since it is larger than the sum of its proper divisors (1231311173).

13221232123 is a wasteful number, since it uses less digits than its factorization.

13221232123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448425.

The product of its digits is 864, while the sum is 22.

Adding to 13221232123 its reverse (32123212231), we get a palindrome (45344444354).

The spelling of 13221232123 in words is "thirteen billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred twenty-three".