13215222123 has 4 divisors (see below), whose sum is σ = 17620296168. Its totient is φ = 8810148080.

The previous prime is 13215222067. The next prime is 13215222127. The reversal of 13215222123 is 32122251231.

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 13215222123 - 2⁹ = 13215221611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13215222093 and 13215222102.

It is not an unprimeable number, because it can be changed into a prime (13215222127) 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, 2202537018 + ... + 2202537023.

It is an arithmetic number, because the mean of its divisors is an integer number (4405074042).

Almost surely, 2^13215222123 is an apocalyptic number.

13215222123 is a deficient number, since it is larger than the sum of its proper divisors (4405074045).

13215222123 is an equidigital number, since it uses as much as digits as its factorization.

13215222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4405074044.

The product of its digits is 1440, while the sum is 24.

Adding to 13215222123 its reverse (32122251231), we get a palindrome (45337473354).

The spelling of 13215222123 in words is "thirteen billion, two hundred fifteen million, two hundred twenty-two thousand, one hundred twenty-three".