12123121222 has 8 divisors (see below), whose sum is σ = 18196002576. Its totient is φ = 6057787032.

The previous prime is 12123121201. The next prime is 12123121289. The reversal of 12123121222 is 22212132121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12123121222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1882773 + ... + 1889200.

It is an arithmetic number, because the mean of its divisors is an integer number (2274500322).

Almost surely, 2^12123121222 is an apocalyptic number.

12123121222 is a deficient number, since it is larger than the sum of its proper divisors (6072881354).

12123121222 is a wasteful number, since it uses less digits than its factorization.

12123121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773582.

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

Adding to 12123121222 its reverse (22212132121), we get a palindrome (34335253343).

The spelling of 12123121222 in words is "twelve billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred twenty-two".