12121222404 has 48 divisors (see below), whose sum is σ = 28768603136. Its totient is φ = 3971116800.

The previous prime is 12121222369. The next prime is 12121222417. The reversal of 12121222404 is 40422212121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1071144 + ... + 1082400.

Almost surely, 2^12121222404 is an apocalyptic number.

It is an amenable number.

12121222404 is an abundant number, since it is smaller than the sum of its proper divisors (16647380732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121222404 is a wasteful number, since it uses less digits than its factorization.

12121222404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12796 (or 12794 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12121222404 its reverse (40422212121), we get a palindrome (52543434525).

The spelling of 12121222404 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-two thousand, four hundred four".