13222223121 has 4 divisors (see below), whose sum is σ = 17629630832. Its totient is φ = 8814815412.

The previous prime is 13222223099. The next prime is 13222223149. The reversal of 13222223121 is 12132222231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13222223121 - 2⁶ = 13222223057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13222223321) 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, 2203703851 + ... + 2203703856.

It is an arithmetic number, because the mean of its divisors is an integer number (4407407708).

Almost surely, 2^13222223121 is an apocalyptic number.

It is an amenable number.

13222223121 is a deficient number, since it is larger than the sum of its proper divisors (4407407711).

13222223121 is an equidigital number, since it uses as much as digits as its factorization.

13222223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4407407710.

The product of its digits is 576, while the sum is 21.

Adding to 13222223121 its reverse (12132222231), we get a palindrome (25354445352).

The spelling of 13222223121 in words is "thirteen billion, two hundred twenty-two million, two hundred twenty-three thousand, one hundred twenty-one".