12222123121 has 8 divisors (see below), whose sum is σ = 13221313280. Its totient is φ = 11231365392.

The previous prime is 12222123119. The next prime is 12222123127. The reversal of 12222123121 is 12132122221.

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

It is not a de Polignac number, because 12222123121 - 2¹ = 12222123119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12222123127) 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 7 ways as a sum of consecutive naturals, for example, 2105091 + ... + 2110888.

It is an arithmetic number, because the mean of its divisors is an integer number (1652664160).

Almost surely, 2^12222123121 is an apocalyptic number.

It is an amenable number.

12222123121 is a deficient number, since it is larger than the sum of its proper divisors (999190159).

12222123121 is a wasteful number, since it uses less digits than its factorization.

12222123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216215.

The product of its digits is 192, while the sum is 19.

Adding to 12222123121 its reverse (12132122221), we get a palindrome (24354245342).

The spelling of 12222123121 in words is "twelve billion, two hundred twenty-two million, one hundred twenty-three thousand, one hundred twenty-one".