12121223404 has 12 divisors (see below), whose sum is σ = 21215212200. Its totient is φ = 6059734208.

The previous prime is 12121223381. The next prime is 12121223423. The reversal of 12121223404 is 40432212121.

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, 187789 + ... + 243940.

It is an arithmetic number, because the mean of its divisors is an integer number (1767934350).

Almost surely, 2^12121223404 is an apocalyptic number.

It is an amenable number.

12121223404 is a deficient number, since it is larger than the sum of its proper divisors (9093988796).

12121223404 is a wasteful number, since it uses less digits than its factorization.

12121223404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438752 (or 438750 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12121223404 its reverse (40432212121), we get a palindrome (52553435525).

The spelling of 12121223404 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-three thousand, four hundred four".