12020400412 has 24 divisors (see below), whose sum is σ = 21834280832. Its totient is φ = 5784177600.

The previous prime is 12020400401. The next prime is 12020400421. The reversal of 12020400412 is 21400402021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245343 + ... + 290230.

Almost surely, 2^12020400412 is an apocalyptic number.

It is an amenable number.

12020400412 is a deficient number, since it is larger than the sum of its proper divisors (9813880420).

12020400412 is a wasteful number, since it uses less digits than its factorization.

12020400412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535789 (or 535787 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12020400412 its reverse (21400402021), we get a palindrome (33420802433).

The spelling of 12020400412 in words is "twelve billion, twenty million, four hundred thousand, four hundred twelve".